杀鸡警猴的英文：
[Literal Meaning]
kill/chicken/warn/monkey
to kill a chicken in order to warn 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]
他这么做只是杀鸡警猴，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.