radar
noun /ˈreɪdɑː(r)/
/ˈreɪdɑːr/
[uncountable]Idioms - a system that uses radio waves to find the position and movement of objects, for example planes and ships, when they cannot be seen
雷达 - They located the ship by radar.
他们通过雷达确定了船只的位置。 - a radar screen
雷达显示屏
Topics Transport by waterc1, Transport by airc1- The aircraft suddenly went off the radar.
飞机突然从雷达显示屏上消失了。 - The submarine is impossible to detect on radar.
雷达不可能探测到这种潜艇。 - navigation by radar
通过雷达导航
Collocations Dictionaryadjective- enemy
- police
- airborne
- …
- be equipped with
- operator
- station
- system
- …
- by radar
- on radar
- off the radar
- on the radar
词源1940s: from ra(dio) d(etection) a(nd) r(anging). - They located the ship by radar.
Idioms
below/under the radar
- used to say that people are not aware of something
在视线以外的；未引起注意的 - Experts say a lot of corporate crime stays under the radar.
专家说许多公司犯罪还没有为人所注意到。 - The conflict has slipped below the radar of the mass media.
这场冲突已被大众媒体忽视。
- Experts say a lot of corporate crime stays under the radar.
on/off the radar (screen)
- used to say that people’s attention is on or not on something
受／不受人关注 - The issue of terrorism is back on the radar screen.
恐怖主义问题重新受人关注。 - Since the scandal broke, all other issues seem to have disappeared off the radar screen as far as the media is concerned.
自丑闻爆发以来，就媒体而言，所有其他问题似乎都已从雷达屏幕上消失。
- The issue of terrorism is back on the radar screen.