杀鸡儆猴的英文：
[Literal Meaning]
kill/chicken/frighten/monkey
to kill a chicken in order to frighten a monkey

[解释]
用惩罚一个人的办法来警告别的人。

[Explanation]
to punish someone as a warning to others

[例子]
他这么做只是杀鸡儆猴，目的是让你们更认真一些。

[Example]
He did this as a warning to you, in order to make you more hardworking.

[英文等价词]
Beat the dog before the lion.

Beat the dog before the lion.
杀鸡儆猴