| 释义 |
DEFINITIVE EXAMPLES 权威例句〔ELSS〕Extravehicular life support system.舱外生命维持系统美国传统〔space walk〕An excursion by an astronaut outside a spacecraft in space; extravehicular activity.太空行走：宇宙员步出航天器在太空中的行走或进行的舱外活动美国传统〔walk〕The self-controlled extravehicular movement in space of an astronaut.太空步：宇航员在宇宙空间宇宙飞船外的自我控制的运动美国传统 |