Optotransistor
光晶体管
🗣️ 情景例句
Five points.
五分。
Time past cannot be called back again.
光阴一去不复返。
I'll have to ring you back, as I need to have a look at my diary and I haven't got it with me.
我得（等会儿）再给你回电话，因为我要先看看我的日记，而我没有把它带在身边。