Examples
很难在2、3年内掌握法语。
It's quite difficult to master French in 2 or 3 years.
Source: Tatoeba
那座建築物會在一年內完工。
The building will be completed in a year.
Source: Tatoeba
这座火山在这年内爆发了两次。
The volcano has erupted twice this year.
Source: Tatoeba