/ˈreɪdɑ:(r) ||; ˈredɑr/noun
[U] a system that uses radio waves for finding the position of moving objects, for example ships and planes 雷达:
This plane is hard to detect by radar.这种飞机雷达很难发现。☞Compare sonar. 与sonar比较。
radar/ˋredɑr; ˈreIdɑː/n [C,U] a method of finding the position of things such as planes and ships using radio waves, or the equipment that does this 雷达﹔雷达装置