With timeboxing you only commit to working on a task or project for a fixed length of time, normally 30-90 minutes. 10-15 minutes is perfectly acceptable.

这样你只要在某项工作上决心干一定时间就可以了，一般有30-90分钟。 10-15分钟也是可以的。

youdao

Also note that in case of database dictionary, the length of each column is fixed at the design time of database schema.

还要注意，对于基于数据库的dictionary，每个列的长度在数据库模式的设计阶段就已经固定。

youdao

There are fixed sizes of plates or beams available and selection involves calculations based on the prescribed delivery rounds, the journey length, number of door openings, time period, etc.

有固定尺寸的盘子或有用的梁并且选择包括基于规定的交付圆的计算，旅程长度，开着门的次数，时间长短等。

youdao

Companies could be barred from using rolling contracts - where the contract is renewed each day so that at any given time directors have a fixed notice period to serve - to get around limits on the length of time they may serve.

BBC: 'Fat cat' pay proposals: At a glance