black and blue字面是“黑色和蓝色”，其真正意思是“青一块紫一块，遍体鳞伤”。

【例句】
Whenever she refused, he'd beat her black and blue.
只要她拒绝他，他就会把她打得青一块紫一块。

If they had not held him back, he would have beaten you black and blue.
如果不是他们挡住他，他已把你打得遍体鳞伤。