These microbes eat copper sulfate and appear to be impossible to kill.

这些微生物靠硫酸存活，并且难被扼杀。

Until about 1902, legal food preservatives included chemicals like formaldehyde, borax and copper sulfate.

1902前合法的食品添加剂还包括甲醛，硼砂和硫酸。

OK, now for number three you need rock salt or copper sulphate.

好的，第三个实验需要你准备石盐或硫酸。

Some of these masses displayed green veins, as if scrawled with undulating lines of copper sulfate.

有些冰块现出绿色脉管，就象那硫酸上面画的波纹线条一样。

Most organic pesticides are natural toxins, like vegetable oils, hot ash soap, sulfur or copper sulfates.

大多数有机农药都是天然毒，像植物油，热灰皂，硫磺或硫酸。

OK, now for number three you need rock salt or copper sulphate.

好的，现第三个你需要岩盐或硫酸。

So the copper sulfate is in the water because it prevents the growth of algae and other living organisms.

存硫酸是因为它可阻止藻类和其他生物的生长。

In fact, in the case of copper sulfate, often used on organic apples, the organic pesticide of choice is actually more harmful to humans.

事实上，硫酸的情况下，常用于有机苹果，有机农药的选择实际上对人类更有害。

In order to keep food looking fresh, food manufacturers used a slew of chemicals, cooper sulfate, a common pesticide, made canned peas bright green.

为了让食物看起来新鲜，食品制造商们用了大量的化学药品，硫酸，是一种杀虫剂，它能让罐装的豆子看起来很绿很鲜亮。

The company physicians did not examine the sick but had them line up behind one another in the dispensaries and a nurse would put a pill the color of copper sulfate on their tongues, whether they had malaria, gonorrhea, or constipation.

公司的医生不检查病人， 而是让他们药房里排成一排， 护士会他们的舌头上放一颗硫酸颜色的药丸，不管他们是患了疟疾、淋病还是便秘。