radar

• 指利用无线电波探测目标并测定其距离、方位或速度的系统或设备，常用于航空、航海、气象等领域。

A noun referring to a detection system that uses radio waves to determine the range, angle, or velocity of objects, such as aircraft, ships, or weather formations.

1. Detection systemB1formalscientific

   A system that uses radio waves to detect the position, speed, and direction of objects such as aircraft, ships, or weather formations.

   雷达

   • The airport uses radar to track incoming flights.
   • Radar detected a storm approaching the coast.
   • The ship's radar showed another vessel nearby.

2. Monitoring deviceB1informaltechnical

   A device used in vehicles to detect obstacles or measure speed.

   雷达

   • My car has a parking radar that beeps when I get too close to an object.
   • Police use radar guns to check if drivers are speeding.
   • The submarine's radar system was upgraded last year.