I

I cannot be your friend and your flatterer too. 朋友不能阿谀奉承。 (flatterer 奉承者)

If a man deceives me once, shame on him; if he deceives me twice, shame on me. 上当一回头，再多就可耻。

If you make yourself an ass, don't complain if people ride you. 人善被人欺，马善被人骑。

If your ears glow, someone is talking of you. 耳朵发烧，有人念叨。

If you run after two hares, you will catch neither. 脚踏两条船，必定落空。

If you sell the cow, you sell her milk too. 杀鸡取卵。

If you venture nothing, you will have nothing. 不入虎穴，焉得虎子。

If you want knowledge, you must toil for it. 要想求知，就得吃苦。

Industry is the parent of success. 勤奋是成功之母。

It is better to die when life is a disgrace. 宁为玉碎，不为瓦全。

It is easier to get money than to keep it. 挣钱容易攒钱难。

It is easy to be wise after the event. 事后诸葛亮好当。

It is easy to open a shop but hard to keep it always open. 创业容易守业难。

It is hard to please all. 众口难调。 (又作: Tastes differ.)

It is never too old to learn. 活到老，学到老。

It is no use crying over spilt milk. 覆水难收。

It is the first step that costs troublesome. 万事开头难。

It is the unforeseen that always happens. 天有不测风云，人有旦夕祸福。

It is too late to grieve when the chance is past. 坐失良机，后悔已迟。 (grieve 悲痛,伤心,忧伤)

It never rains but it pours. 不鸣则已，一鸣惊人。

It takes three generations to make a gentleman. 十年树木，百年树人。

J

Jack of all trades and master of none. 门门精通，样样稀松。

Judge not from appearances. 人不可貌相，海不可斗量。

Justice has long arms. 天网恢恢，疏而不漏。

Keep good men company and you shall be of the number. 近朱者赤，近墨者黑。

Kill two birds with one stone. 一箭双雕。

Kings go mad, and the people suffer for it. 君王发狂，百姓遭殃。

Kings have long arms. 普天之下，莫非王土。

Knowledge is power. 知识就是力量。

Knowledge makes humble, ignorance makes proud. 博学使人谦逊，无知使人骄傲。

Learn and live. 活着，为了学习。

Learning makes a good man better and ill man worse. 好人越学越好，坏人越学越坏。

Learn not and know not. 不学无术。

Learn to walk before you run. 先学走，再学跑。

Let bygones be bygones. 过去的就让它过去吧。

Let sleeping dogs lie. 别惹麻烦。

Let the cat out of the bag. 泄漏天机。

Lies can never changes fact. 谎言终究是谎言。

Lies have short legs. 谎言站不长。

Life is but a span. 人生苦短。

Life is half spent before we know what it is. 人过半生，方知天命。

Life is not all roses. 人生并不是康庄大道。

Life is not always a bed of roses. 生活未必都是称心如意的。

Life without a friend is death. 没有朋友，虽生犹死。

Like a rat in a hole. 瓮中之鳖。

Like author, like book. 文如其人。

Like father, like son. 有其父必有其子。

Like for like. 一报还一报。

Like knows like. 惺惺相惜。

Like mother, like daughter. 有其母必有其女。

Like teacher, like pupil. 什么样的老师教什么样的学生。

Like tree, like fruit. 羊毛出在羊身上。

Little things amuse little minds. 小人无大志。

Look before you leap. 摸清情况再行动。

Lookers-on see more than players. 当局者迷，旁观者清。

Losers are always in the wrong. 胜者为王，败者为寇。

Lost time is never found again. 岁月既往，一去不回。

Love at first sight. 一见钟情。

Love cannot be compelled. 爱情不能强求。

Love is blind. 爱情是盲目的。

Love is full of trouble. 爱情充满烦恼。

Love is never without jealousy. 没有妒忌就没有爱情。

Love me, love my dog. 爱屋及乌。

Make hay while the sun shines. 良机勿失。

Make your enemy your friend. 化敌为友。

Man is the soul of the universe. 人是万物之灵。

Man proposes, God disposes. 谋事在人，成事在天。

Many hands make light work. 众人拾柴火焰高。

Many heads are better than one. 三个臭皮匠，赛过诸葛亮。

Many things grow in the garden that were never sown there. 有心栽花花不发，无心插柳柳成荫。

Measure for measure. 针锋相对。

Misfortunes never come alone. 祸不单行。

Misfortune tests the sincerity of friends. 患难见真情。