对此，至今还没有一个令人信服的理论描述，甚至连其产生根源也未有定论。

A satisfactory theoretical explanation for this behavior has proven elusive. There are even some doubts about its origin.

youdao

在场的每个人都莫名其妙，惊诧不已，连波特也不例外。

A puzzled amazement awoke in every face in the house, not even excepting Potter's.

youdao

他们似乎并未受到一连串有关士耳其经济坏消息的影响。

They seem unfazed by a stream of bad news about the Turkish economy.

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And the service sector economy in India is booming and finally even the industry sector has done a little better.

其第三产业开始高速发展,最后连第二产业,也蓬勃发展起来。

普林斯顿公开课 - 国际座谈会课程节选

There are some exceptions but, for the most part, even the people who do study Freud within psychology departments do so critically.

虽然有些例外,但大多数情况下，就连在心理学系中研究弗洛伊德的学者,也会对其有所批判。

耶鲁公开课 - 心理学导论课程节选