光发射

light emission的用法和样例：

例句

The reason is a fundamental one associated with the mechanism of light emission.其基本原因涉及到光发射的机理。
The blue regions show the cool optical emission, detected by Hubble, from the dust and gas thrown off the star.蓝色部分表示寒冷的光发射，由哈勃探测到，来自摆脱恒星的尘埃和气体。

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