Keep good men company and you shall be of the number.近朱者赤近墨黑。

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 humble¹, ignorance² makes proud.

博学使人谦逊，无知使人骄傲。 Learn and live.活着，为了学习。

Learning³ 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。Let sleeping dogs lie.别惹麻烦

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 the cat out of the bag.泄漏天机。Life is but a span⁴.人生苦短。

Lies can never changes fact.谎言终究是谎言。

Lies have short legs.谎言站不长。

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 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。