得承认这只是一种理论，但其各部分自成一体。

It's only a theory, admittedly, but the pieces fit together.

《柯林斯英汉双解大词典》

一种理论是，它们是由于人类的猎杀而灭绝的。

One theory is that they were hunted to extinction by humans.

youdao

甚至有一种理论认为手机要对蜜蜂的消失负责！

There's even one theory that mobile phones should be responsible for the disappearance of bees!

youdao

This is one respectable theory, but the alternative is they have the right knowledge, but they suffer from problems with inhibition.

这是一个被广泛接受的理论,但另一种观点则认为,婴儿拥有恰当的知识,只不过是他们无法解决抑制的问题

耶鲁公开课 - 心理学导论课程节选

Maybe the soul theorist has an alternative available to it that-- available to him that the other theories don't have.

也许灵魂理论者还有一种-,其他理论没有的可能。

耶鲁公开课 - 死亡课程节选

Geoffrey Hartman's theory had a similar tendency to align the poem with a kind of a religious orthodoxy.

哈特曼的理论有着相似的趋势,给这首诗附加上一种宗教上的正统思想。

耶鲁公开课 - 弥尔顿课程节选