Optronics
光电子学, 光导发光学
🗣️ 情景例句
I don't know how to solve the problem. Will you help me out?
我不知道该怎么解决这个问题。你能帮我吗？
I was not aware that I was in danger.
我不知道自己处于危险中。
Gradually the river grows wider, the banks recede,
然后河面渐渐地变宽，两岸后撤，