Monoether
单醚
🗣️ 情景例句
I've got to explain about it.
我得解释一下此事。
I'm sorry. I'm engaged now.
对不起，我现在正忙着。
He had no sooner returned than he bought a house and went to live there.
他刚一回到英国便买下了一幢房子住了进去。