You are way out of your league.

你简直是在不自量力。

Next, to bite off more than you can chew.

接下来，不自量力。

You're insane bringing battle.Why you diggin' your own grave?

你来挑战实在不自量力，为何要自掘坟墓？

I think he's bitten off more than he can chew.

我觉得他有些不自量力了。

" The fact is, " resumed Thomas Flanagan, " Mr. Fogg's project was absurdly foolish. Whatever his punctuality, he could not prevent the delays which were certain to occur;and a delay of only two or three days would be fatal to his tour" .

" 老实话，" 多玛斯·弗拉纳刚，" 斐利亚·福克的计划也显得他太不自量了。不论他多么精明，他也没法防止那些不可避免的耽搁。只要误个两三天，他这趟旅行就必定垮了。"

Let's say, I volunteer to give a presentation at school a day before my exam, and now I have no idea how I can prepare for both. I think I've bitten off more than I can chew.

比方，我在考试前一天自愿去学校做，在我不知道如何准备这两件事。我想我是不自量力了。

So any time, the idea of like giving another actress performance advice or notes to me just sounds like really, I'm overstepping my place.

所以任何时候， 想到要给另一位女员提供表建议或意见， 对我来就像是在越界，显得我不自量力。

Oh well, just watch me. -I don't think you can do it.

噢 瞧好吧 -有点不自量力啊。

It echoes the Chinese saying used to describe someone reaching beyond their ability.

这呼应了中国用来形容某人不自量力的法。