Photonics
[复]n.[用作单][物]光子学
🗣️ 情景例句
You had better study hard.
你最好努力学习。
What is done cannot be undone.
木已成舟。
Master in his own house, he has little idea of when to say boo to a maitre d'hotel.
他们在家可能是主人，但不知道什么时候才能对酒店的经理表示不满。