英语语法分析

The first person to go on a spacewalk in the world was Alexei Leonov from Russia.

世界上第一个进行太空行走的人是来自俄罗斯的阿列克谢·列昂诺夫。

When on a spacewalk, astronauts use safety tethers to stay close to their spacecraft.

当宇航员在太空行走时，他们会使用安全绳以保持他们与飞船的距离。

For every one hour, they will spend on a spacewalk, astronauts need to train seven hours in the pool.

宇航员在太空漫步中花费的每一个小时，都是他们在泳池里训练7个小时换来的。