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 one can call back yesterday.
昨日不会重现。
No pains, no gains.
没有付出就没有收获。
No pleasure without pain.
没有苦就没有乐。
No rose without a thorn.
没有不带刺的玫瑰。
No sweet without sweat.
先苦后甜。
No smoke without fire.
无风不起浪。
Nothing brave, nothing have.
不入虎穴，焉得虎子。
Nothing dries sooner than a tear.
眼泪干得最快。
Nothing in the world is difficult for one who sets his mind to it.
世上无难事，只怕有心人。
Nothing is difficult to the man who will try.
世上无难事，只要肯登攀。
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。
Not to advance is to go back.
不进则退。
Not to know what happened before one was born is always to be a child.
不懂世故，幼稚可笑。
No way is impossible to courage.
勇者无惧。
Obedience is the first duty of a soldier.
军人以服从命令为天职。
Observation is the best teacher.
观察是最好的老师。
Offense is the best defense.
进攻是最好的防御。
Old friends and old wines are best.
陈酒味醇，老友情深。
Old sin makes new shame.
一失足成千古恨。
Once a man and twice a child.
一次老，两次小。
Once a thief, always a thief.
偷盗一次，做贼一世。
Once bitten, twice shy.
一朝被蛇咬，十年怕井绳。
One boy is a boy, two boys half a boy, three boys no boy.
一个和尚挑水喝，两个和尚抬水喝，三个和尚没水喝。
One cannot put back the clock.
时钟不能倒转。
One eyewitness is better than ten hearsays.
百闻不如一见。
One false move may lose the game.
一着不慎，满盘皆输。
One good turn deserves another.
行善积德。
One hour today is worth two tomorrow.
争分夺秒效率高。
One man's fault is other man's lesson.
前车之鉴。
One never loses anything by politeness.
讲礼貌不吃亏。
One swallow does not make a summer.
一燕不成夏。
One's words reflect one's thinking.
言为心声。
Out of debt, out of danger.
无债一身轻。
Out of office, out of danger.
无官一身轻。
Out of sight, out of mind.
眼不见，心为静。
Patience is the best remedy.
忍耐是良药。
Penny wise, pound foolish.
贪小便宜吃大亏。
Plain dealing is praised more than practiced.
正大光明者，说到的多，做到的少。
Please the eye and plague the heart.
贪图一时快活，必然留下隐祸。
Pleasure comes through toil.
苦尽甘来。
Pour water into a sieve.
竹篮子打水一场空。
Practice makes perfect.
熟能生巧。
Praise is not pudding.
恭维话不能当饭吃。
Praise makes good men better, and bad men worse.
好人越夸越好，坏人越夸越糟。
Prefer loss to unjust gain.
宁可吃亏，不贪便宜。
Prevention is better than cure.
预防胜于治疗。
Pride goes before, and shame comes after.
骄傲使人落后。
Promise is debt.
一诺千金。
Proverbs are the daughters of daily experience.
谚语是日常经验的结晶。
Pull the chestnut out of fire.
火中取栗。
Put the cart before the horse.
本末倒置。
Put your shoulder to the wheel.
鼎力相助。
Reading enriches the mind.
开卷有益。
Reading is to the mind while exercise to the body.
读书健脑，运动强身。
Respect yourself, or no one else will respect you.
要人尊敬，必须自重。
Rome is not built in a day.
冰冻三尺，非一日之寒。
Saying is one thing and doing another.
言行不一。
Seeing is believing.
眼见为实。
Seek the truth from facts.
实事求是。
Send a wise man on an errand, and say nothing to him.
智者当差，不用交代。
Set a thief to catch a thief.
以贼捉贼。
Short accounts make long friends.
好朋友勤算账。
Something is better than nothing.
聊胜于无。
Soon learn, soon forgotten.
学得快，忘得快。
Soon ripe, soon rotten.
熟得快，烂得快。
Speech is silver, silence is gold.
能言是银，沉默是金。
Still water run deep.
静水常深。
Strike the iron while it is hot.
趁热打铁。
Success belongs to the persevering.
坚持就是胜利。
Take things as they come.
既来之，则安之。
Talking mends no holes.
空谈无补。
Talk of the devil and he will appear.
说曹操，曹操就到。
Tall trees catch much wind.
树大招风。
Teach others by your example.
躬亲示范。
The best hearts are always the bravest.
无私者无畏。
The best man stumbles.
伟人也有犯错时。
The cat shuts its eyes when stealing.
掩耳盗铃。
The danger past and God forgotten.
过河拆桥。
The darkest hour is nearest the dawn.
黎明前的黑暗。
The darkest place is under the candlestick.
烛台底下最暗。
The devil knows many things because he is old.
老马识途。
The devil sometimes speaks the truth.
魔鬼有时也会说真话。
The die is cast.
木已成舟。
The early bird catches the worm.
早起的鸟儿有虫吃。
The end justifies the means.
只要目的正当，可以不择手段。
The end makes all equal.
死亡面前，人人平等。
The eye is bigger than the belly.
贪多嚼不烂。
The farthest way about is the nearest way home.
抄近路反而绕远路。
The finest diamond must be cut.
玉不琢，不成器。
The fire is the test of gold, adversity of strong man.
烈火验真金，艰难磨意志。
The first step is the only difficulty.
迈出第一步是最艰难的。
The fox knew too much, that's how he lost his tail.
机关算尽太聪明，反误了卿卿性命。
The fox preys farthest from home.
兔子不吃窝边草。
The frog in the well knows nothing of the great ocean.
坐井观天。
The grass is greener on the other side.
这山望着那山高。
The greatest talkers are always least doers.
语言的巨人总是行动的矮子。
The higher up, the greater the fall.
爬得高，摔得惨。
The leopard cannot change its spots.
本性难移。
The more noble, the more humble.
人越高尚，越谦虚。
The more wit, the less courage.
初生牛犊不怕虎。
The outsider sees the most of the game.
旁观者清。
The pen is mightier than the sword.
笔能杀人。
The pot calls the kettle black.
五十步笑百步。
There are spots in the sun.
太阳也有黑点。
There are two sides to every question.
问题皆有两面。
There is a skeleton in the cupboard.
家家有本难念的经。
There is kindness to be found everywhere.
人间处处有温情。
There is no general rule without some exception.
任何法规均有例外。
There is no medicine against death.
没有长生不老药。
There is no place like home.
金窝银窝不如咱的狗窝。
There is no royal road to learning.
书山有路勤为径，学海无涯苦作舟。
The style is the man.
字如其人。
The tongue is not steel, yet it cuts.
人言可畏。
The water that bears the boat is the same that swallows it up.
水能载舟，亦能覆舟。
The wise man knows he knows nothing, the fool thinks he knows all.
清者自清，浊者自浊。
The wolf has a winning game when the shepherds quarrel.
螳螂捕蝉，黄雀在后。
The world is a ladder for some to go up and others to go down.
世界如阶梯，有人上有人下。
The world is but a little place, after all.
海内存知己，天涯若比邻。
Think twice before you do.
三思而后行。
Things at the worst will mend.
否极泰来。
Time and tide wait for no man.
时不我待。
Time cures all things.
时间是医治一切创伤的良药。
Time flies.
光阴似箭。
Time is money.
时间就是金钱。
Time lost cannot be won again.
时光流逝，不可复得。
Time past cannot be called back again.
时间不能倒流。
Time tries all.
路遥知马力，日久见人心。
Tit for tat is fair play.
人不犯我，我不犯人；人若犯我，我必犯人。
To err is human.
人非圣贤，孰能无过。
To know everything is to know nothing.
什么都知道，一如什么都不知道。
To know oneself is true progress.
人贵有自知之明。
Tomorrow never comes.
我生待明日，万事成蹉跎。
Too much familiarity breeds contempt.
过分熟悉会使人互不服气。
Too much knowledge makes the head bald.
学问太多催人老。
Too much liberty spills all.
自由放任，一事无成。
Too much praise is a burden.
过多夸奖，反成负担。
To save time is to lengthen life.
节约时间就是延长生命。
Touch pitch, and you will be defiled.
常在河边走，哪有不湿鞋。
Troubles never come singly.
福无双至，祸不单行。
Truth never grows old.
真理永存。
Turn over a new leaf.
洗心革面，改过自新。
Two dogs strive for a bone, and a third runs away with it.
鹬蚌相争，渔翁得利。
Two heads are better than one.
一个好汉三个帮。
Two of a trade seldom agree.
同行是冤家。
Two wrongs do not make a right.
别人错了，不等于你对了。
Unity is strength.
团结就是力量。
Unpleasant advice is a good medicine.
忠言逆耳利于行。
Until all is over one's ambition never dies.
不到黄河心不死。
Venture a small fish to catch a great one.
吃小亏占大便宜。
Virtue is fairer far than beauty.
美德远远胜过美貌。
Walls have ears.
小心隔墙有耳。
Wash your dirty linen at home.
家丑不可外扬。
Water dropping day by day wears the hardest rock away.
滴水穿石。
Wealth is nothing without health.
失去健康，钱再多也没用。
We know not what is good until we have lost it.
好东西，失去了才明白。
Well begun is half done.
好的开始，是成功的一半。
We never know the worth of water till the well is dry.
井干方知水可贵。
We shall never have friends if we expect to find them without fault.
欲求完美无缺的朋友必然成为孤家寡人。
We should never remember the benefits we have offered nor forget the favor received.
自己的好事别去提，别人的恩惠要铭记。
Wet behind the ears.
乳臭未干。
Whatever you do, do with all your might.
不管做什么，都要一心一意。
What is learned in the cradle is carried to the grave.
儿时所学，终生难忘。
What's done cannot be undone.
生米煮成熟饭了。
What's lost is lost.
失者不可复得。
What we do willingly is easy.
愿者不难。
When in Rome, do as the Romans do.
入国问禁，入乡随俗。
When everybody's somebody then nobody's anybody.
人人都伟大，世间没豪杰。
When sorrow is asleep, wake it not.
伤心旧事别重提。
When sorrows come, they come not single spies, but in battalions.
新仇旧恨，齐上心头。
When the fox preaches, take care of your geese.
黄鼠狼给鸡拜年，没安好心。
When wine is in truth, wit is out.
酒后吐真言。
Where there is a will, there is a way.
有志者事竟成。
Where there is life, there is hope.
留得青山在，不怕没柴烧。
Where there is smoke, there is fire.
事出有因。
While the priest climbs a post, the devil climbs ten.
道高一尺，魔高一丈。
Who chatters to you, will chatter of you.
搬弄口舌者必是小人。
Whom the gods love die young.
好人不长命。
Wise man have their mouths in their hearts, fools have their hearts in their mouths.
智者嘴在心里，愚者心在嘴里。
Work makes the workman.
勤工出巧匠。
You cannot burn the candle at both ends.
蜡烛不能两头点，精力不可过分耗。
You cannot eat your cake and have it.
鱼与熊掌，不可得兼。 （衣人注：此翻译不尽准确，仅供参考。）
You can take a horse to the water but you cannot make him drink.
强扭的瓜不甜。
You may know by a handful the whole sack.
由一斑可知全貌。
You never know what you can till you try.
是驴子是马，拉出来遛遛。
参考资料：http://www.wwenglish.com/en/ez/2/2471.htm