“自不量力”，亦作“不自量力”，意思是自己不估量自己的能力，指過高地估計自己的力量（overestimate one's own strength or ability），與英文諺語“bite off more than one can chew”意思相近，表示“to take (on) more than one can deal with; to be overconfident”。

例句：

我本應(yīng)該小心，但是我自不量力。下來的時候我?guī)缀趿⒓词タ刂?，結(jié)果撞到一棵樹上受傷了。
Instead of being cautious, I bit off more than I could chew. On my way down, I lost control almost immediately and slammed into a tree and got injured.

你得小心，不要自不量力。
Be careful you don't bite off more than you can chew.

Editor: Jade