Don’t have a cow就是没有奶牛？
1.A black sheep
Jack has always been the black sheep of our team.
2.Don’t have a cow
Don’t have a cow! I will pay you back as soon as I get out of the red.
We are going to have a buffet this night, that’s to say we can really pig out!
4.Right off the bat
I realized that she is my goddess right off the bat.
5.Teach a pig to play on a flute
it’s hard for him to give a speech in front of so many audiences，you are teaching a pig to play on a flute！
The boss just makes decisions and we have to do all the donkey work .