eva
eva — noun
- evasingular
- evasplural
1. a period when astronauts leave a spacecraft or space station to work outside it
a period when astronauts leave a spacecraft or space station to work outside it in space.
Mission control delayed the EVA after a small leak appeared near the hatch.
delay the EVA before an outside repair
Naoko checked her gloves twice before the EVA to repair the broken antenna.
before the EVA + repair task
The crew trained underwater for months to prepare for a long EVA.
During the EVA, Joaquín replaced a loose panel outside the space station.
Snow-like ice floated past Bao's helmet as the EVA began.
- spacewalk
the everyday term used in news reports and general conversation
- extravehicular activity
the full formal term used in mission planning and technical writing
文法句型
an EVA
during the EVA
conduct an EVA
用法筆記
This sense refers to the actual work period outside the spacecraft. In general news, the more familiar everyday synonym is often 'spacewalk'.
常見錯誤
eva — abbreviation
1. the short form of 'extravehicular activity'.
the short form of 'extravehicular activity'.
The training manual uses EVA instead of writing out extravehicular activity each time.
abbreviation replacing the full term
Thursday's schedule lists EVA-2 beside Meera's name and tool assignment.
EVA + number in mission schedules
In the report, EVA stands for extravehicular activity, not a spacewalk alone.
The checklist puts EVA prep in bold above the airlock steps.
A museum label explained that EVA was NASA shorthand for work outside a spacecraft.
- extravehicular activity
the full expression that this abbreviation stands for
文法句型
EVA + number
EVA stands for ...
EVA + prep
用法筆記
Use this sense when you are talking about the letters EVA as a label in manuals, schedules, or reports. If you mean the mission activity itself, use the noun sense instead.