介绍:
to lead adog's life
形容人过着穷困潦倒、惨不忍睹的生活
dog eat dog
竞争激烈
work like a dog
指一个人努力卖命的工作
sick as a dog
病得很重
let sleeping dogs lie
不要自找麻烦，自讨苦吃
dog tired
筋疲力尽
every dog has its days
每个人都有属于自己的运气，每个人都有时来运转的一天
meaner than a junkyard dog
冷漠 不友好
you can never teach an old dog new tricks
老人学不好新东西
