She suspected that secret influences were at work.

她怀疑有些秘密势力在作祟。

《牛津词典》

Some simplistically attribute the decline in our public education system to the drain of skilled students by private schools, but far more significant events were at work.

一些人将公共教育体系的衰退简单粗暴地归因于私立学校技能型学生的流失，但更重要的因素仍在发挥其影响。

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Researchers measured people's cortisol, which is a stress marker, while they were at work and while they were at home and found it higher at what is supposed to be a place of refuge.

研究人员测量了人们在工作时和在家里时的皮质醇，即一种压力标志的水平，结果发现在家里，这个原本应该是安身之所的地方，皮质醇含量更高。

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They were put to work as cleaners at fish farms along the Mississippi River and in wastewater treatment systems.

VOA: special.2009.12.15

A psychology that will look at also things that work, that were not just study-- depression, anxiety, schizophrenia and neurosis.

需要着眼于有用的东西，不仅仅是研究-,抑郁，焦虑，精神分裂，神经症。

哈佛公开课 - 幸福课课程节选

Puritans at this moment in English history were placing, when thinking about how things should work at church, more and more emphasis on the sermon, the institution of the sermon.

清教徒指的是在英国历史上，致力于研究教会事务，并把重点越来越多的放在布道训诫之上的人。

耶鲁公开课 - 弥尔顿课程节选

When we were at work, we were worrying about what was happening at home.

WHITEHOUSE: Forum on Workplace Flexibility: Closing Session

The situation changed little in the following decade, but other forces were at work.

CNN: Gadhafi's demise and the Arab Spring

We passed a warehouse-like building under construction where several men in hard hats were at work.

NEWYORKER: Fussbudget