"not know your own strength" in Chinese (Simplified)
不知道自己的力量
Definition
用于形容某人因为不知道自己有多强而做事超过了本意的力度。
Usage Notes (Chinese (Simplified))
这个短语通常带有幽默，用在因为用力过猛而意外损坏东西的情况，也可以指无意中超过预期力度的行为。
Examples
He broke the door handle because he did not know his own strength.
他把门把手弄断了，因为他**不知道自己的力量**。
Sometimes children don't know their own strength and break their toys.
有时候孩子们**不知道自己的力量**，把玩具弄坏了。
You do not know your own strength when you carry those heavy bags so easily.
你搬那些沉重的袋子这么轻松，**你不知道自己的力量**。
She hugged me so tightly that I almost couldn't breathe—she really doesn't know her own strength!
她抱我抱得太紧了，我差点喘不过气——她真的**不知道自己的力量**！
Sorry about your chair—I guess I didn't know my own strength when I sat down!
对不起你的椅子——我猜我坐下时**不知道自己的力量**！
He snapped the broom in half—he really doesn't know his own strength sometimes.
他把扫帚都掰断了——有时候他真的**不知道自己的力量**。