Grumbling
a. 出怨言的；喃喃鸣不平的
✅ 同义词
🔴 反义词
🗣️ 情景例句
we would like to have our investments returned as early and safely as possible.
我们总想尽早而又安全地收回我们的投资。
Just let it be.
就这样吧。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。