I believe in the theory that the higher animals developed from the lower ones.

我相信比较高级的动物是由比较低级的动物进化而来的这一学说。

youdao

Since I believe in the body theory, the good news is, you will exist after your death.

因为我相信身体理论，好消息就是，你死后依然生存着。

youdao

I think probably we shouldn't believe the theory of belief which says that in order to believe in something, you've got to be able to picture it or believe it.

我觉得我们不能相信下面这种理论，如果要相信一件事情，这件事情必须能够被想象出来。

youdao

Thomas Hobbes was the author of the first and, I believe, undoubtedly the greatest, work of political theory written in the English language.

托马斯·霍布斯是第一部，我相信，毫无疑问也是最伟大的一部，用英语写成的,政治学著作的作者。

耶鲁公开课 - 政治哲学导论课程节选

Since I believe in the body theory,the good news is, you will exist after your death.

因为我相信身体理论，好消息就是，你死后依然生存着。

耶鲁公开课 - 死亡课程节选

I have to believe that whoever came up with that theory for the first time was aided in coming to it by thinking about the end of the Roman Empire, when something precisely like that did happen.

我想任何人第一次接触该理论,都会自动联想到罗马帝国的衰亡,进而支持该理论,因为类似的事情确实曾经发生过

耶鲁公开课 - 古希腊历史简介课程节选