No one can call back yesterday.昨日不会重现。

No rose without a thorn.没有不带刺的玫瑰。

Not to advance is to go back.不进则退。

No way is impossible to courage.勇者无惧。

No man can do two things at once.一心不可二用。

No man is born wise or learned.没有生而知之者。

Success belongs to the persevering.坚持就是胜利。

No man is content.人心不足蛇吞象。

No man is wise at all times.聪明一世，糊涂一时。

None are so blind as those who won’t see.视而不见。

None are so deaf as those who won’t hear.充耳不闻。

No news is good news.没有消息就是好消息。

No cross, no crown.不经历风雨，怎么见彩虹。

No pains, no gains.没有付出就没有收获。

No pleasure without pain.没有苦就没有乐。

New wine in old bottles.旧瓶装新酒。

No sweet without sweat.先苦后甜。

No smoke without fire.无风不起浪。

Never too old to learn, never too late to turn.亡羊补牢，为时未晚。

He is a fool that forgets himself.愚者忘乎所以。

No garden without its weeds.没有不长草的园子。

Nothing seek, nothing find.没有追求就没有收获。

Nothing is so necessary for travelers as languages.外出旅行，语言最要紧。

Nothing is to be got without pains but poverty.世上唯有贫穷可以不劳而获。

Never say die.永不言败。

Strike the iron while it is hot.趁热打铁。

Penny wise, pound foolish.贪小便宜吃大亏。

Offense is the best defense.进攻是最好的防御。