I still do a certain amount of work for them.

我仍旧为他们做一定数量的工作。

《柯林斯英汉双解大词典》

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》

People who earn under a certain amount are not liable to pay tax.

收入低于一定数额者不必纳税。

《牛津词典》

"There is a certain amount of that islander style there," Ken Walsh of the magazine USNews and World Report.

VOA: standard.2010.01.16

One is time, that I think it takes certain amount of time to shed the thoughts, the anxiety in everything else.

第一是时间，要想,摆脱一些想法，摆脱焦虑，是需要一定的时间的。

普林斯顿公开课 - 人性课程节选

you do certain amount of years in the military, and then you get what's called a GI bill,

你先在军队服役几年，当你退役的时候，你就能获得美国军队的补贴,

拿全额奖学金 - SpeakingMax英语口语达人

Maybe it takes a certain amount of meanness to be successful, at least in business.

FORBES: Study: More Money Makes Managers Meaner

For example, it suggests requiring executives who earn more than a certain amount to donate to charity.

FORBES: Study: More Money Makes Managers Meaner

No one doubts that a certain amount of liquidity needs to be injected into the economy.

FORBES: Bush's Plan: Too Much, Too Soon