I mean it意思

"I mean it" 這句話的意思是說話者強調他們所說的是認真的，不是開玩笑或隨便說說。這句話通常用來表達說話者的決心、 seriousness（嚴肅性）或 honesty（誠實性）。

例如：

1. A: You should really study for the test. B: I know, I know. I mean it this time, I'm going to study all night.

2. A: You don't seem very excited about the party. B: I am! I mean it, I think it's going to be a lot of fun.

3. A: You promised to help me move this weekend. B: Yes, I promise. I mean it, you can count on me.

In each of these examples, the second person is using "I mean it" to emphasize that they are serious about what they are saying.