A radar gun timed the speed of the baseball.

一支雷达枪测出了棒球的速度。

《柯林斯英汉双解大词典》

Each paratrooper must correctly leave the platform of the simulator, gain speed, take out a gun and get ready for shooting.

每位伞兵必须正确得脱离模拟装置台，加速、取出枪，准备好射击。

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Anolog speed signal VEL from SDC is also taken as speed feedback signal to form speed loop in gun servo system.

SDC输出的模拟速度信号VEL还可以作为速度反馈信号以构成火炮伺服系统中的速度回路。

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But the new measures drew ire from the nation's largest gun lobby over the speed with which the bill was passed in the new legislative session.

CNN: STORY HIGHLIGHTS

If the perceptual abilities of autocars were hooked into the police (moving about in their self-driven patrol cars), every road would be a speed trap and every car a radar gun.

ENGADGET: Editorial: Self-driving cars FTW, but not for everybody