one of the greatest philosophers of his times and of all times.

他是当时乃至历史上最伟大的哲学家之一
Descartes ascribed to something what I call dualism. Right?

笛卡尔主张二元论
Dualism really meant that he separated the soul and body from each other,

真正的二元论意味着他区分了灵魂与肉体
and Hobbes rejected this idea of dualism

霍布斯则反对二元论的观点
because he suggested that--

因为他提出
in fact, they were engaged in a big debate on optics, what we do see.

我们知道事实上他们在光学上也有争论
And he, Hobbes, was advocating that there must be

霍布斯主张一定存在真正的客体
a real object whose movement we see, what we actually can see.

我们可以也确实能够看到它
So he rejected the dualism.

他拒绝了二元论
And then he wrote--I mentioned very briefly--his trilogy:

随后他写了他的哲学三部曲
De Corpore, this is about the human body,

我只简要讲下包括关于人体的《论物体》
De Homine, about man, and finally De Cive, about society.

关于人的《论人》和关于社会的《论公民》