Permutability
换排性, 转置性, 交换性
✅ 同义词
🗣️ 情景例句
It's getting late. Please excuse me, but I must leave right away.
时间不早了。对不起，我得赶紧走了。
Are you finished?
请问您还用吗？
The question was, which one?
问题是，哪一种气体导致火灾呢？