These changes are called attenuation.

这些变化称为衰减。

Attenuation of light is in the form of absorption.

光是以吸收的形式衰减。

When covered by your hand, this antenna suffers from attenuation.

当你用手覆盖了这个点，天线信号就会衰减。

A new method of precise measurement of optical fiber attenuation.

一种新的精确测试光纤衰减方法的探讨。

One is attenuation control mode and the other is power control mode.

一种是衰减比例控制模式，另一种是功率控制模式。