I bet they can add up to a pretty penny if you aren't careful.

我确信如果你平常不是很小心的话，这些账单的数目还是相当可观的。

youdao

I bet they can add up to a pretty penny if you aren't careful.

我确信如果你平常不是很小心的话，这些账单的数目还是相当可观的。

youdao