Lend your money and lose your friend.赔了夫人又折兵.

Let beggars match with beggars.龙配龙，凤配凤.

Let bygones be bygones.既往不昝.

Let difficulties occur but not the loss of courage.纵使困难重重，也不丧失勇气.

Let every man praise the bridge he goes over.饮水思源.

Let every man speak well of the bridge theat carries him over.饮水思源.

Let every tub stand on its own bottom.各人管各人自己.

Let not the cobbler go beyond his last.安分守己.

Let not the sun go down upon thy wrath.日落之前，平息你的怒火吧.

Let our object be our courtry, our whole country, and nothing but our country.我们的心目中要有国家，要有整个国家，而且只有我们的国家别如其他.

Let sleeping dogs lie.不要惹事生非.

Let the cat out of the bag.泄漏天机。

Let the cobbler stick to his last.安分守己.

Let the dead bury the dead.往事不重提.

Let the hands get busy, not the mouth.手要勤劳，嘴莫多说.

Let things take their course.听其自然.

Let your yea be yea and your nay be nay.是就是，非就非.

Let's cross the bridge when we come to it.既来之，则安之.

Liars have need of good memories.谎言者要有好的记忆力.

Liars should have good memories.说谎的人应有好的记性.

Liberty consists in the power of doing that which is permitted by law.自由就是做法律许可做的事情的权力.

Liberty is not licence.自由不是放纵.

Liberty often degenerates into lawlessness.自由随便，经常堕落到无法无天.

Lie in (oron) the bed one has made.自作自受.

Lies can never changes fact.谎言终究是谎言。

Lies have short legs.谎言是站不住脚的.