A certain of sadness, pain or worries is essential to everyone.

一定的忧愁、痛苦或烦恼，对每个人都是时时必需的。

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A certain amount of flexibility is built into the system.

该体系加入了一定的灵活性。

《牛津词典》

There's a certain mood of fatalism now among the radicals.

现在极端分子中有种宿命论的情绪。

《柯林斯英汉双解大词典》

"The Lomaxes,John and Alan, thrfather and son team and then Bess to a certain extent worked at the Library of Congress.

VOA: special.2010.01.18

It's actually better to spend a certain amount of time just keeping your body in good condition

其实花一定时间保持身体的良好状态更好，

健康生活 - SpeakingMax英语口语达人

Aengus is the Celtic name, the Celtic master of love a certain kind of Irish version of Apollo.

安古斯是个凯尔特名字，是爱神,是爱尔兰的阿波罗。

耶鲁公开课 - 现代诗歌课程节选

All three formulas put aside a certain amount of assets and a certain amount of income in a safe spot.

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In regards to your particular question, bipolar disorder (also known as manic depression) is nothing but a description of a certain pattern of symptoms.

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The present Federal Reserve floating fiat monopoly currency is a certain type of tool to achieve a certain type of goal the goal of prosperity-through-currency manipulation.

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