You bet. 当然。
表示肯定地；没问题；当然等意思，除了"certainly; of course"，"you bet"在口语中更常见。

【范例一】Will you tell her? You bet (I will).

你会告诉她吗？当然会。

【范例二】She'll probably insist on having the very last penny that is due to her--you bet she will.

她很可能会坚持要求属于她的每一分钱——她肯定会。

【范例三】Can you do it? You bet.

这件事你能干吗？当然行！

A: Excuse me. May I use the phone first?

对不起，能让我先用一下电话吗？

B: Are you in a hurry?

你很着急吗？

A: You bet. I was supposed to call my mother an hour ago.

没错。我应该一个小时前打电话给我母亲的。

B: In that case, here, you go first.

既然这样，喏，你先用吧。