单词：pure phosphor
pure phosphor的用法和样例：
例句
- Fractions of the phosphor are easily lost.部分磷光体容易丢失。
- For instance, the phosphor on a CRT screen needs to be constantly reactivated by an electron beam in order to remain illuminated.例如，阴极射线管荧光屏上的磷光体为了保持它激发光状态，需要用电子束不断地再激励。
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