However, in 1965, astronomers used Doppler radar to observe Mercury and directly measure its spin and they got a surprise: its day was only 59 Earth days long, not 88.

然而，在1965，天文学家使用多普勒雷达观察水星，并量了它自转周期，他们大吃一惊：水星上一天只有59个地球日，而不是88个。

Researchers have developed a device that uses low-powered Doppler radar to decode the unique geometry of a user's heart...

研究人员研发了一种设备，可以利用低功率多普勒雷达来解析用户心特几何形状，以。

Along with the sands, the plane also has radar in its nose, doppler radar in its tail.

除了这个设备之外，飞机机头还装有雷达，机尾装有多普勒雷达。

Now the term Doppler probably rings a bell because of Doppler radar that's used to measure the speed of a car or the speed of raindrops falling from the sky.

如今，提到“多普勒”这个词，你可能会联想到多普勒雷达，这种技术用于量汽车速度或从天而降雨滴速度。

This storm's been on Doppler radar for a week.

这场风暴在多普勒雷达上已经有一周了。