You have to allow for a certain amount of error.

你必须考虑到一定数量的错误。

《柯林斯英汉双解大词典》

In our human society, when a child's parents meet their unfortunate deaths for a certain reason or reasons, or its parents become too sick to look after it, this child will have to find a foster family, especially when it is a baby or at a very young age.

在我们人类社会中，当一个孩子的父母因为某种或多种原因不幸去世，或者其父母病重而无法照顾自己时，这个孩子就得找一个寄养家庭，尤其当他还是个婴儿或年龄较小时。

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It is important to assess our suitability for a certain career in job search.

在找工作时评估我们是否适合某个职业是很重要的。

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"And it was quite an issue,quite honestly, because housekeeping has been doing business a certain way for many,many years,"

VOA: standard.2009.03.30

If there is atmosphere in the passage I'm about to quote from Macbeth, it must be atmosphere of a certain kind and there for a certain reason.

如果下面这篇《麦克白》里的选段有所谓的“气氛“,那这种气氛一定因为某种原因以某种形式存在着。

耶鲁公开课 - 文学理论导论课程节选

An insurance company has reserves and it has enough reserves to cover them for a certain number of accidents.

保险公司一般都有准备金,准备金的数量一般保持在,刚刚够赔偿一定数量的保单

耶鲁公开课 - 金融市场课程节选

Memory products might be 10-15% off for a certain two to three-day span, for example.

FORBES: Online Retailer Newegg Mobilizes For Black Friday Sales

But for a certain segment of Internet users it could be a no-brainer update.

CNN: Review: A closer look at Facebook Home

His on-field presence was a shade too statistically minded for a certain kind of fan.

NEWYORKER: King of Walks