Now, he didn't have a science background.

他以前只是个推销员。

The first one: Pat and I have no science background.

第一个：帕特和我没有科学背景。

First, if you could just explain what you do, tell me how you explain it to people who are not in your field, who don't have any science background, how do you break down the work that you do?

首先，如果你可以介绍你的工作的话，对于不在你专业领域的、没有任何科学背景的人士，你会如何解释呢？