Caption:: In space, instrument repairs and module installations, mostly are done by extravehicular activities(EVA) carried out by astronauts in weightlessness.是什么意思_Caption:: In space, instrument repairs and module installations, mostly are done by extravehicular activities(EVA) carried out by astronauts in weightlessness.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句