h 是什么意思

百度 据介绍，电动汽车安全全球技术法规（EVS-GTR）制定工作自2012年启动，在中国、美国、欧盟和日本共同牵头下成立了专门的法规起草工作小组，联合全球近50个国家和地区开展大量的技术研究、试验验证和沟通协调工作。

A tourist poses for a photo at the Humble Administrator's Garden in Suzhou, east China's Jiangsu Province, Feb. 25, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

An aerial drone photo shows tourists visiting the Humble Administrator's Garden in Suzhou, east China's Jiangsu Province, Oct. 23, 2024.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

An aerial drone photo shows the scenery of the Humble Administrator's Garden in Suzhou, east China's Jiangsu Province, Oct. 23, 2024.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

A girl makes a lacquer fan at the Lion Grove Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

A tourist visits the Lion Grove Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Li Bo)

Tourists visit the Humble Administrator's Garden in Suzhou, east China's Jiangsu Province, Feb. 25, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Li Bo)

Tourists visit the Lion Grove Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

An aerial drone photo shows the scenery of the Lion Grove Garden and its surroundings in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

An aerial drone photo shows the scenery of the Lion Grove Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

A tourist visits the Humble Administrator's Garden in Suzhou, east China's Jiangsu Province, Feb. 25, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Li Bo)

An aerial drone photo shows the scenery of the Lion Grove Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)

This photo shows the scenery of the Master-of-Nets Garden in Suzhou, east China's Jiangsu Province, Feb. 26, 2025.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Li Bo)

An aerial drone photo shows the scenery of the Huqiu scenic area in Suzhou, east China's Jiangsu Province, Oct. 23, 2024.

Suzhou is known as a city of gardens, with its numerous classical gardens considered some of the most beautiful in the country, and nine of them serving as UNESCO world heritage sites.

Throughout history, the garden design has always been intertwined with Chinese literature and the art of landscape painting.

The protection and restoration of Suzhou's old city and classical gardens have been carried on for decades. The height of buildings in the ancient city is kept below 24 meters so as to preserve historical skylines. Hundreds of ancient buildings and classical gardens have also been effectively protected. (Xinhua/Ji Chunpeng)