A: We've got to tighten our belt for the next month if we want to make the trip to Los Angeles.

A：如果我们想去洛杉肌旅行,下个月就要省吃俭用了。
B: Oh, yeah, it's my dream to visit the city.
B：哦，没错.去洛杉矶旅行可是我的梦想。

A: Since you're not working and my salary is the only income source of this family. We've got to tighten our belt.

A：由于你没工作，我的收人是这家的唯一的经济来源。我们得省吃俭用。
B: Sorry, honey, I promise I'll find a job soon.
B：真对不起，亲爱的，我保证尽快找到工作。
重点讲解：
We've got to be thriftier.
We've got to tighten our belt.
手头紧时，就要省吃俭用了，We've got to be thriftier. 虽然能表达此意，但是口语中更常见：We've got totighten our belt.这个说法，字面意思就是"勒紧裤腰带"，这一点和中文的表达很相近。