不自量力
Go beyond one's depth.
Overreach oneself.
Bite off more than one can chew.
Throw straws against the wind.
eg:Trying to solve that problem is to 90 beyond her depth for Lily.
中英俚語俗語來源:戰(zhàn)國策·齊策三:“荊甚固,而薛亦不量其力。”
同義詞:瞠臂當車 Kick against the pricks.
反義詞:人貴有自知之明 Know myself.