Heterolaser
异质结激光器
🗣️ 情景例句
I'm just calling to confirm your appointment tomorrow at 3:00 p.m.
我打电话确认明天下午3点你约定的时间。
A new bicycle is out of the question - we can't afford it.
买新自行车的事谈不上 —— 我们买不起。
What did your boss say to him?
你老板是怎么对他说的？