Fluorophor
荧光体
🗣️ 情景例句
No. I really don't know how to go about it.
没有。我真不知道如何填。
Congratulations on your having passed the test.
我恭喜你通过了考试。
and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。