EVA
noun [ C ] uk/ˌiː.viːˈeɪ/ us/ˌiː.viːˈeɪ/
（航天员）舱外活动
abbreviation for extra-vehicular activity: an occasion when someone goes outside a spacecraft or aircraft while it is in space or in the air, in order to perform a particular task
The first EVA was a very tense and critical moment. 第一次舱外活动是让人非常紧张而又意义重大的一刻。
Compare: spacewalk