The work must be completed within a certain time limit.

这项工作必须在一定期限内完成。

《牛津词典》

In this era of Twitter.com and cell-phone text messaging, the many long URLs that don't fit within the 140-character limit placed on messages can be a hassle.

在这个 Twitter.com 和手机消息通讯时代，许多长 URL 不能满足消息上设置的 140 个字符的限制，这是一件麻烦事！

youdao

In case rooms in a building with workshop or warehouse have already been used as dormitory, the problem shall be solved within a time limit.

在设有车间或者仓库的建筑物内，已经设置员工集体宿舍的，应当限期加以解决。

youdao

The steeplechase follows, a 3, 105m course featuring three brush fences that have to be jumped three times and, once again, it must be completed within a time limit.

BBC: SPORT | TV/Radio Listings | Grandstand | Three-day eventing explained

If a trader does not book an OTC trade at the appropriate time, red flags should rise as all trades need to be confirmed within a specified time limit from the execution.

FORBES: Rouge Trading...Blinded By Profits

That figure would fall to 65% within a year, and in the years after that the limit would be 50%.

WSJ: Indian IT Workers in Cross Hairs of U.S. Bill