Commutant
换位子群, 导出群
🗣️ 情景例句
That's quite a difference from the directions that Pete sent me.
这和Pete寄给我的路线指示完全不同。
Don't drop that bottle on the floor.
别让那只瓶子掉到地上。
The question was, which one?
问题是，哪一种气体导致火灾呢？