radar
/BrE ˈreɪdɑː 
, AmE ˈreɪˌdɑr /
noun
[uncountable] 雷达;
by radar 通过雷达;
they were following the course of the submarine on the radar 他们当时正在用雷达追踪潜水艇;
a radar screen/sensor/beacon 雷达显示屏／传感器／信标
radar
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