man's cost.前車可鑒。
It is ill to waken sleeping dogs. [let sleeping dogs lie; don't wake a sleeping dog.] 別多事, 別惹麻煩。
It is in to be on the safe side.
It is lost labour to sow where there is no soil.沒有土壤，播種也是徒勞。
It is no use crying best spilt milk.
It is not work that kills,but worry.工作不會傷身，傷身乃是憂慮。
It is right to put everything in its proper use.凡事都應用得其所。
It never rains, but it pours.
It rains cats and dogs. 下傾盆大雨, 大雨滂沱
It takes two to tango.
It is no good crying over the spilt milk. 覆水難收。
It takes two to make a quarrel.一隻碗不響。
【𝗼𝗼𝗽.𝘁𝘄 無錯章節】
Jack of all trades, master of none.
Keep your mouth shut and your ears open.
Kill two birds with one stone.一箭雙雕。
Knowledge advances by steps and not by leaps.知識隻能循序漸進，不能躍進。
Knowledge is power.知識就是力量。
Laughter is the best medicine.
Lead a dog's life 過著牛馬不如的生活
Lead a dog's life 過窮困潦倒的日子
Learn wisdom by the follies of others.從旁人的愚行中學到聰明。
Let bygones be bygones.
Let sleeping dogs lie.
Let the buyer beware.
Let the cat out of the bag 說走了嘴, (無意中)泄露秘密
Let the dead bury their dead.
Let sleeping dog lie. 不要惹是生非。
Let's call a spade a spade.直言不諱。
Life is just a bowl of cherries.
Lightning never strikes twice in the same place.
Like a cat on hot bricks 局促不安, 如熱鍋上的螞蟻
Like father, like son.
Like mother, like daughter.
Live and learn.
Live like cat and dog [口]整天吵架
Live a cat and dog life（夫妻）過著不和諧的生活（誤：過著貓和狗一般的生活）
Living without an aim is liking sailing without a compass. 生活沒有目標等於航行沒有指南針。
Look after number one.
Look on the bright side.
Look before you leap.三思而後行。
Lookers-on see most of the game. 旁觀者清。
Love conquers all.
Love is blind.
.dnuor og dlrow eht sekam evoL
。烏及屋愛 ;友朋當友朋的我把要也 ,友朋當我把若你 .god ym evol ,em evoL
.stluaf on sees evoL
.yaw a dnif lliw evoL
烏及屋愛.god ym evol ,em evoL
。好陽太趁要草曬.senihs nus eht elihw yah ekaM
.enola daerb yb evil tonnac naM
。舉易擎眾.krow thgil ekam sdnah ynaM
。快活乾多人.krow kciuq ekam sdnah ynaM
。多成少積.elkcim a sekam elttil a ynaM
。事辦好多人 .krow thgil sekam sdnah ynaM
.nevaeh ni edam era segairraM
.eid ot snigeb eh nrob si nam sa noos sA yaM
.thgir si thgiM
.ssenisub nwo ruoy dniM
.live lla fo toor eht si yenoM
.gnihtyreve t'nsi yenoM
。達不則速欲.deeps ssel ,etsah eroM
）地覆天翻：誤（力全儘竭；法辦切一儘想htrae dna nevaeh evoM
.noitnevni fo rehtom eht si ytisseceN
cihw taht worromot llit reted reveN
