Like father， like son. 有其父必有其子

little or nothing 只差一点点

live a dog's life 过着牛马不如的生活

live by oneself 独居

live up to one's words 履行诺言

loafing around 游手好闲

lone wolf 独自一人

long stories 说谎；吹牛皮

Long time no see. 好久不见

look before you leap 三思而后行

look for a needle in a key stack 大海捞针

look for trouble 自讨苦吃

look here 听我说

look into 调查

look out 当心

look over 快速检查

look up 探望；涨价；形势好转；查字典

look up to sb 尊敬某人

Look who you're talking to. 看清楚你是在对什么人说话。

looking forward to， be 期待

lose one's nerve 紧张，没勇气

lose one's shirt. 输得精光

lose track of the days 把时间搞糊涂了

lose track of time 弄乱时间

lost count 弄不清楚

lost one's nerve 失去勇气

lost one's temper 发脾气

lost weight 瘦了

loudmouth 多嘴的人

lousy cliches 陈词滥调

lousy things 讨厌的事；卑鄙下流的事

lucky dog 幸运儿