Marginalist
a. 边际主义的
🗣️ 情景例句
Please do the work at your own convenience.
请在方便时把这事做一做。
I don't know what to say. I'd like to replace it.
我不知说什么好。我赔一个新的给你。
We were out of the part you needed.
你要的那种零件我们没有货了，