In more and more countries, women started having fewer children than the number required to keep populations stable.

在越来越多的国家里，妇女的生育数目减少，已无法保持人口稳定。

youdao

Taking living organisms away from their habitats should only be done for a clear and specific purpose. Collect the minimum number required.

必须在有真正需要的情况下，方可把生物带走，而且只可带走最少的数量。

youdao

We used to think that incrementing the major version number required this kind of major new feature, but, in the 2.6.x time frame, we have stopped doing feature-based releases.

我们习惯于认为，主版本号的提升就必须伴有重大功能的实现。但是，在2.6 . x时代，我们不再因为功能实现而发布版本。

youdao

The amendments are meant to decrease the number of documents NGOs are required to provide and ease the registration process.

VOA: standard.2009.08.04

And so when we say something is exponential, we're talking about in terms of the number of bits required to represent it.

所以当我们说某些东西，是指数增长的我们指的,就是代表它的比特数。

麻省理工公开课 - 计算机科学及编程导论课程节选

So we can completely describe an orbital with just using three quantum numbers, but we have this fourth quantum number that describes something about the electron that's required for now a complete description of the electron, and that's the idea of spin.

所以我们可以用３个,量子数完全刻画轨道，但我们有这第四个量子数,来完整的,描述电子，这就是自旋的概念。

麻省理工公开课 - 化学原理课程节选

Ryder Cup organisers say more than 9, 000 people have come forward to volunteer at the event, more than five times the number required.

BBC: Applications to volunteer at the Ryder Cup hit 9,000

Other variations: being one credit short of the number required to graduate, missing a critical court date or having to take an exam in a course for which they never went to class.

FORBES: Six Ways To Save Face When You Are Caught Unprepared

The goal of the letters is to protect taxpayers by ensuring that all paid federal tax return preparers are registered with the IRS, and sign tax returns they prepare and use an identifying number when required to do so.

FORBES: 100,000 Preparers Who Failed to Follow New Registration Rules Are a Danger to Public