They've replaced the chemical solution with dry cells filled with chemical paste.

他们用学粘浆的干电池取代了学溶液。

We put them on our bodies and even our faces. Other chemical products are used throughout our homes.

我们用它们来洗身体，甚至洗脸。其他的学品用在家里的方方面面。

In the very next lecture, the professor taught that for viral diseases, chemically treated virus wouldn't do the trick.

在接下来的一节课中，教授告诉他们，于病毒性疾病来说，用学方法处理的病毒行不通的。

Yeah, oh, I wanted to check the chemicals we used in the lab when we analysed those samples — was it potassium chromate and silver nitrate?

没错。了，我想确认一下在实验室分析那些样品时使用的学制剂，我们用的钾和硝银，吗？

Well, if it isn't sweetened with real sugar, a lot of times it's sweetened with chemically derived additives that can be not so good for your health.

好吧，如果它不用真正的糖来增甜，那么很多时候它用学衍生的添加剂来增甜的，这些添加剂可能您的健康不利。

So the answer is not to make a spacecraft out of a flashlight, by having the exhaust come out this way and the spacecraft goes that way -- that's what we do today with chemistry.

所以答案不用手电筒制造航天器，让废气从这边出来， 然后航天器朝那边走——这就我们今天用学所做的事情。