Seva
abbr. stand-up extravehicular activity （宇航员在外层空间的）直立舱外活动
🗣️ 情景例句
He was more than helpful.
他不仅仅是帮忙。
A useful trade is a mine of gold.
一样有用的手艺是取之不尽的财富。
Thanks, Mum.
谢谢，妈妈。