Optronics
光電子學, 光導發光學
??? 情景例句
I don't know how to solve the problem. Will you help me out?
我不知道該怎么解決這個問題。你能幫我嗎？
I was not aware that I was in danger.
我不知道自己處于危險中。
Gradually the river grows wider, the banks recede,
然后河面漸漸地變寬，兩岸后撤，