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。对了，我想下在实验室分析那些样品时使用的化学制剂，我们用的是铬酸钾和硝酸银，对吗？

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

他们用充满化学粘浆的干电池取了化学溶液。

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

在接下来的节课中，教授告诉他们，对于病毒性疾病来说，用化学方法处理的病毒是行不通的。

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.

所以答案不是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——这就是我们今天用化学所做的事情。

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，如果它不是用真正的糖来增甜，那么很多时候它是用化学衍生的添加剂来增甜的，这些添加剂可能对您的健康不利。