The
Doppler effect is responsible for the change in pitch we hear when a vehicle with a siren approaches and then recedes from us.
多普勒效应是当一辆鸣笛的车辆向我们靠近然后远离时,我们听到音调变化的原因。
Using
Doppler radar, meteorologists can track the speed and direction of storms to predict severe weather conditions.
利用多普勒雷达,气象学家可以追踪风暴的速度和方向以预测恶劣天气情况。
In cardiology, the
Doppler ultrasound helps measure blood flow velocity through arteries and veins.
在心脏病学中,多普勒超声波有助于测量血液流经动脉和静脉的速度。
Astronomers rely on the
Doppler shift to determine whether stars or galaxies are moving towards or away from us.
天文学家依赖于多普勒频移来确定恒星或星系是否在朝向我们移动还是远离我们。
The redshift observed in distant galaxies is attributed to the cosmological
Doppler effect caused by the expansion of the universe.
在遥远星系中观察到的红移归因于宇宙膨胀引起的宇宙学多普勒效应。
Doctors use continuous-wave
Doppler to detect any obstructions or abnormalities within blood vessels.
医生使用连续波多普勒检测血管内的任何阻塞或异常。
With color
Doppler imaging, we can visualize blood flow inside the heart and other organs in real-time.
通过彩色多普勒成像,我们可以实时可视化心脏和其他器官内部的血流。
The police deployed a
Doppler radar gun to measure the speed of passing vehicles and catch speeding drivers.
警察部署了多普勒雷达枪来测量过往车辆的速度并抓拍超速驾驶者。
The sound of a train whistle changes as it passes due to the
Doppler effect, becoming higher pitched as it approaches and lower pitched as it moves away.
当火车经过时,由于多普勒效应,其汽笛声会发生变化,在接近时音调变高,远离时音调变低。
Satellite navigation systems like GPS utilize the
Doppler effect to calculate their precise location and speed.
如GPS这样的卫星导航系统利用多普勒效应来计算它们精确的位置和速度。
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