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美国国家航空航天局宣布，原定于29日在国际空间站实施的太空行走由“女子双打”改为“男女混双”，航天史上首次全女性太空行走最终未能成行。背后的原因是其中一名女性宇航员发现她的舱外航天服硬壳内衣不合身，中号更合适，但到29日仅有一件中号航天服可供使用，只能满足一名女航天员出舱。 NASA’s plan to make a little space history with the first all-woman spacewalk has hit a snag: The right size spacesuit isn’t ready. 美国宇航局原本打算在太空史上迈出一小步，实施首次全女性太空行走任务，却意外遇到了困难，原因竟是没准备好合身的航天服。 snag[snæɡ]: n. 障碍；意外障碍 Astronauts Anne McClain and Christina Koch were expected to continue the installation of new lithium-ion batteries for the International Space Station’s solar energy system on March 29. Work on the project began on March 22 when McClain and another astronaut, Nick Hague, spent almost seven hours working in free fall outside the station. 3月29日，宇航员安妮·麦克莱恩和克里斯蒂娜·科赫本来计划继续为国际空间站的太阳能系统安装新的锂离子电池。这项工程于3月22日开始，麦克莱恩和另外一名宇航员尼克·黑格在空间站外的微重力状态下工作了近7个小时。 "McClain learned during her first spacewalk that a medium-size hard upper torso—essentially the shirt of the spacesuit—fits her best,” NASA said in a news release announcing that Hague and Koch would handle the next stage of the task instead. “Because only one medium-size torso can be made ready by Friday, March 29, Koch will wear it.” | 
