You can return the item within a month.

你可以在一个月之内退货。

The price of the stock tripled within a month.

该股票的价格在一个月内增加到三倍。

They had a whirlwind romance and got married within a month.

他们经历了一场旋风般的恋爱，并在一个月内结婚了。

The plan is practicable and can be implemented within a month.

这个计划是可行的，可以在一个月内实施。

This book became a best-selling novel within a month of its release.

这本书在发行一个月内就成为了畅销的小说。

He signed a promissory note promising to repay the loan within a month.

他签了一张本票，承诺在一个月内还款。

When lab rats are not allowed to sleep, they die within a month.

当实验鼠不能睡觉时，它们会在一个月内死亡。

It'll crack up within a month.

实验室将在一个月内坠毁。

Within a month the idea was dropped.

不到一个月时间，这个变更名字的想法就被放弃了。

We'd be typically within a month ahead.

一般是提前一个月。