本周，两名美国宇航员，Christina H Koch和Jessica Meir，将进行一次太空行走，对国际空间站作例行维护工作。碰巧，被安排此次任务的两名宇航员都是女性，因此这也将成为人类航天历史上首次，完全由女性进行的太空行走任务。图源：NASA

This week, two American astronauts, Christina H Koch and Jessica Meir, will conduct a spacewalk and routinely maintain the International Space Station.,As it happens, the two astronauts who were assigned to the mission were all female, so this will be the first spacewalking mission in the history of human aerospace.,Source: NASA