We have to set a time limit for the work.

　　我們得為這項工作規定個期限。

　　The work must be completed within a certain time limit.

　　這項工作必須在一定期限內完成。

　　The data is limited in terms of both quality and quantity.

　　這份資料在質量和數量上都很有限。

　　We are doing our best with the limited resources available.

　　我們利用可獲得的有限資源，盡最大的努力。

　　He was driving at well over the speed limit.

　　他當時開車的速度遠遠超過了限制。