Altern
a. [古]轮流的；交错的（等于alternate）
🗣️ 情景例句
Yes. I'll hold. He's checking. You do?
好， 我会等。他正在查。真的有了？
Provide for the worst, the best will save itself.
作最坏的准备，可以得到最好的结果。
I've got a problem and as I don't know what to do I thought I'd write to you and ask for your advice.
我有一个问题，因为我不知道该怎么办。我想我最好写信给你，征求你的意见。