That was a good 'un.

那个东西不错。

《牛津词典》

A UN official said he thought it was an open question whether sanctions would do any good.

一位联合国官员表示，他认为对于制裁是否能够起到作用这个问题，尚无定论。

《柯林斯英汉双解大词典》

The an rule is a good example: Whenever it sees 'an', it prints 'un'.

an 规则是一个很好的示例：每次它看到 “an” ，就打印 “un” 。

youdao

Those Americans backing the hard-charging Mr Bolton say that he is the ideal man right now, as the UN needs a good shake-up.

ECONOMIST: Corruption at the heart of the United Nations | The

But Russia, China and France have all warned against that - arguing that the use of force would solve nothing and could lead to the expulsion of the UN inspectors for good.

BBC: Despatches

Going to the UN is well and good.

ECONOMIST: The United States, Israel and the Arabs