Because of their narrow bandwidth, CF signals portray only the target's presence and, in the case of some bat species, its motion relative to the bat's.

因为它们的频宽很窄，CF 信号只能描绘目标的存在，而对于一些种类的蝙蝠来说，CF 信号还能描述目标相对于蝙蝠的运动。

youdao

This world has some absolute motion relative static, right?

而这世上还有些绝对运动中的相对静止吧？

youdao

But the earth is in motion relative to the sun, the sun is in motion relative to some other star, and so on.

但地球相对于太阳运动，太阳相对于某些其他恒星运动，等等。

youdao

Nowadays, people just jump out of the dark all of a sudden and screech (cheap scare) or creatively disembowel screeching second-string actors (more gross than actually frightening.) Couple that with a veneer of macho stylishness, and you've got yourself a relative facsimile of a motion picture.

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There's also a handful of elements that we seldom see in these apps, such as a direction-relative wind indicator, optional motion-driven navigation and visual themes.

ENGADGET

It requires that electricity be used to create the motion that is recaptured through regeneration from the relative weights and positions of the elevator vehicle and the counterweight.

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