System that detects objects by reflecting radio waves

• Equipment or installation using such a system
• Figurative: keen ability to notice something

利用反射无线电波探测目标的系统

• 采用该系统的设备或装置
• 引申义：敏锐的察觉能力

To scan or track using radar

• Figurative: to search for or detect carefully

用雷达扫描或跟踪

• 引申义：像用雷达一样细致搜寻

Uppercase variant of radar, originally an acronym

• Treated as a common noun in modern usage

雷达一词的大写形式，源自首字母缩略词

• 现今多作普通名词使用