fluorescence
n[U]
property that a substance has of emitting light while being exposed to light or some other radiation of a shorter wavelength 荧光. Cf 参看 phosphorescence.
🗣️ 情景例句
He and Michelle
他和 Michelle
There is a skeleton in every house.
每座房子都有骨架。
He noticed at once that discipline was slack: the Danes had the self-confidence of conquerors, and their security precautions were casual.