Don't try to do it

不───no

No mathematician is infallible; he may make mistakes, but he must not hedge.───没有一位数学家是一贯正确的; 他可能会犯错误, 但他绝不会回避任何一个问题.

There is no harm in trying it.───不妨一试.

He's denied having an affair with secretary but of course there's no smoke without fire.───他不承认他和他的秘书有染,但是无风不起浪啊.

There's no need to get excited.───无须乎着急.

We thought you'd emigrated."—"No, no."───我们还以为你已经移民了呢。”—“不，没有。”

We've tried this method for no one knows how many times.───这种方法我们已不知试了多少次.

They gave me much abuse for no fault.───他们无缘无故地大骂我.

No, no, no," Morris said crossly.───不，不，不，”莫里斯愤怒地说。

I am in no mood for joking.───我没闲心开玩笑.

There is no ground for alarm.───没有理由惊惶失措.

Black will take no other hue.

There is no reason to complain.

No one can understand how I really feel.

A gloved cat catches no mice.

A forced kindness deserves no thanks.

He has no sense of responsibility.

Once on shore, we pray no more.

True coral needs no painter's brush.

I had no choice in the matter.