Kentrolite
硅铅锰矿
🗣️ 情景例句
Richard, isn't that too much to ask of your mother?
Richard，那是不是太麻烦你母亲啦？
We must get back to first principles.
我们必须回到基本原则上来。
And then quickly and quietly we did just that.
于是，我们就迅速而且悄悄地干了起来。