Permutoid
[化]交换体
🗣️ 情景例句
As simple as that.
就这么简单。
How soon can you have your product ready?
你们多久才可以把产品准备好呢？
Sometimes I think this house will be knocked down by a passing plane.
有时我觉得这房子就要被一架飞过的飞机撞倒。