Tetraether
四醚
🗣️ 情景例句
Well, that's what fathers are for.
嗯，父亲们的用处正在于此。
Would you mind calling back sometime tomorrow?
你介意明天某时打电话回来吗？
We'd better take it up with them, in that case.
如果是那样，我们最好向他们提出来。