Optronics
光电子学, 光导发光学
🗣️ 情景例句
And you never know
而你永远也猜不到
The post office is right on the corner, You can't miss it.
那邮局就在转角的地方，很好找。
7 p.m. Will you be free then?
晚上7点。那时你有空吗？