以什么什么为借口 英文怎么说？

(以某事为理由)
use as an excuse;
on the pretext of;
on the excuse of:
那淘气的男孩借口头疼, 离开了教室。
The naughty boy left the classroom on the plea of a headache.
一个人不应该借口缺乏经验来为其错误辩解。
One should not plead inexperience in excuse of his mistake.

一楼的回答已经很不错了,可以采纳