Noncommuting
非对易的
🗣️ 情景例句
Yes. Those are excellent gifts. Who else do you need to buy for?
当然，这是都是最佳礼物。你还需要买给谁？
A faithful friend is hard to find.
益友难得。
Good! That's done. Now the tree must be tied to the stick.
好的！做好了。现在该把树系在木棍上了。