Then you already have some knowledge of color theory.

那时大家就已经掌握了一些色彩理论的知识。

In order to understand how the human body works, you need to have some knowledge of chemistry.

【order】为了了解人体是如何工作的，你需要掌握一些化学知识。

It was lucky I had some knowledge of the Spencer John crowd, and that Steve was one of them.

幸运的是我对 Spencer John 人群有一些了解， 而史蒂夫就是其中之一。

So he clearly had some knowledge of how to control a plane. Whether he had ever flown a plane before, we just don't know.

显然他拥有控制飞机的知识。但是我们不知道他以前是否驾驶过飞机。