Barking dogs seldom bite.
吠犬不咬人（意指：对于高声发出恐吓，或惯于大声吼叫的人，勿须当真）。
Every dog has his day.
凡人皆有得意日（意指：大家都有走运的一天）。
Dog does not eat dog.
同类不相残；同室不操戈。
a cat-and-dog life
争争吵吵的日子
Dog does not eat dog.
同类不相残，同时不操戈
Dumb dogs are dangerous.
不叫的狗咬人
Give a dog a bad name and hang him.
谗言可畏，欲加之罪，何患无辞
go to the dogs
每况愈下
hang-dog look
愁眉苦脸
If the old dog barks, he give the counsel.
老狗叫，是忠告。
Love me, love my dog.
爱屋及乌
He is a lucky dog.
他是个幸运儿。
lead a dog\'s life
过穷困潦倒的日子
not have a dog\'s chance
毫无机会
top dog
当权派；头儿
treat sb. like a dog
不把某人当人看
a hunting dog
猎犬
a lazy dog
懒汉
a gay dog
一个快乐的人
a dirty dog
下流坯
dog-days n.[pl.]
三伏天, 大热天; 无所作为的时期, 无精打彩的日子
A good dog deserves a good bone.
[谚]好狗应该啃好骨头, 有功者受赏。
A living dog is better than a dead lion.
[谚]死狮不如活狗。
A staff [stick] is quickly [soon] found to beat a dog with.
[谚]欲加之罪, 何患无辞。
An old dog barks not in vain.
[谚]老狗不乱吠; 老狗 一吠, 就得小心。
An old dog will learn no new tricks. (=You cannot teach old dogs new tricks.)
[谚]老狗学不了新把戏; 老年人很难适应新事物。
as [like] a dog with two tails
非常开心[高兴]