If you say that something is done nicely, you mean that you think it is done in an attractive, pleasant, or enjoyable manner.
He's just written a book, nicely illustrated and not too technical.
他刚写完一本书,插图精美,专业性也不是太强。
If you treat someone nicely, you are friendly, pleasant, or polite towards them.
He treated you very nicely and acted like a decent guy.
他待你很好,行为举止非常得体。
If something is happening or working nicely, it is happening or working in a satisfactory way or in the way that you want it to.
She has a bit of private money, so they manage quite nicely.
她有一些私房钱,因此他们过得还不错。
do nicely
If someone or something is doing nicely, they are being successful.
another hotel owner who is doing very nicely.
另一个非常成功的旅店老板。