During his duty time, for certain reason if he wants to take a short leave, he must be approved by the duty engineer and concerned supervisor.

在值班时间内因故离开岗位时要得到值班工程师和有关主管的批准。

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He asserted that his power to follow a long and purely abstract train of thought was very limited, for which reason he felt certain that he never could have succeeded with mathematics.

他断言，在理解冗长且完全抽象的一系列观点方面，他的能力非常有限，因此他深信自己在数学上永远不会成功。

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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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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

For much the same reason, America is also including duty-free privileges for certain imports from nearby bits of Indonesia in its planned deal with Singapore.

ECONOMIST: Trade in Asia

Auto-immune diseases are caused when the immune system, for some reason, decides that a certain type of the body's own cells are foreign and starts attacking them.

BBC: Body may cause lethal heart weakness

However, workers seem to like them, and for good reason: because they promise a certain level of pension, companies rather than employees carry the main risk.

ECONOMIST: Pensions: How's your pension doing? | The