The comparison shows considerable disagreement between theory and practice.

这一对比表明理论和实践之间有相当大的出入。

《牛津词典》

Students need to get a strong foundation in literary theory and criticism before I let them in the room.

学生们必须要有良好的文学理论和文学评论的基础，这样我才能让他们参加这门课程。

youdao

Plausible as this seems, it is still a theory and based on our more comprehensive knowledge of land-based animals.

这似乎是合理的，但它仍然是一种理论，这个理论是基于我们对陆生动物的更全面的认识。

youdao

And she explains the theory of evolution through natural selection in a way that both children and adults will enjoy.

VOA: special.2009.02.27

Now this may suggest a certain condescension both toward theory and toward literary text, which is not at all intended.

选择这篇文章也许意味着,要对理论和文本进行一定的浓缩，这一点不是我想要的。

耶鲁公开课 - 文学理论导论课程节选

Well, so I mean, he is... when he invented all the theory about the space time and all this,

嗯，他呢……他发明所有这些空间时间理论的时候，

以爱因斯坦为榜样 - SpeakingMax英语口语达人

Research: undertake and coordinate forefront research in the field of number theory and arithmetic geometry.

UNESCO: Vacancy : Senior Research Scientist (31/5/2011) (EU/TP/ITA/SC/0856 - (P4))

It is a conspiracy theory and one that the prime minister takes great exception to.

BBC: Firefighters suspect a plot

It was taught as a special subject quite distinct from the theory and practice of architecture.

UNESCO: Intangible Cultural Heritage