For some time past it has been widely accepted that babies — and other creatures — learn to do things because certain ACTS lead to "rewards" and there is no reason to doubt that this is true.

自古以来人们普遍接受这种观点：婴儿或别的生灵学会做事情是由于某些行动得到了“回报”，也没有理由对这种真相表示疑问。

youdao

I have taken note that the rumor has exerted certain negative impact internationally, which is the reason that I made official clarification on that just now.

我注意到那条谣言在国际上产生了一些负面影响，所以今天我在这里正式对此进行澄清。

youdao

The reason, necessity and plan of improving the structure of discharge lattice board were expounded. It has certain reference value for the same type of lattice board structure improvement.

本文论述了自磨机排矿格子板结构改进的原因、必要性及方案等，对同类格子板结构改进有较大参考价值。

youdao

There's a reason the brain has evolved to forget certain things.

CNN: ASIANOW - TIME Asia | Brainteaser

At the very least, it is fair to say Michael Skakel has, for whatever reason, often acted out in ways certain to arouse suspicion.

CNN: Moxley Case: Excerpts from the Sutton Report

The main reason is that China has a tradition for women and men to get married at a certain age.

BBC: Q&A: Chinese dating consultant Zhou Xiaopeng