Is just a chemical reaction that compels animals to breed.

不过是让动物繁衍后代的化反应罢了。

Studies of both animals and humans have shown that sex hormones somehow affect the stress response, causing females under stress to produce more of the trigger chemicals than do males under the same conditions.

于动物和人类的研究都显示出性激素会某种程度去影压力的反应，导致同样的条件下，女性产生更多的致病化物质。

Some of the early names referred to their chemical properties.

早期的一些名字提到了它们的化特性。

When I left college, I worked in developing chemical dyes.

大毕业后，我从事化染料的开发工作。

The disposal of chemical waste is a serious problem.

化废弃物的处理是项严重的问题。

Output of autos, home electronics and chemicals all rose.

汽车、家用电器以及化品的产出率均上升。

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药品，硫酸铜，是一种杀虫剂，它能让罐装的豆子看起来很绿很鲜亮。

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，我想确认一下实验室分析那些样品时使用的化制剂，我们用的是铬酸钾和硝酸银，吗？

Look, she is in your chemistry class, isn't she? You are good at chemistry.

听，你的化课上，不是吗？你擅长化。

Similar studies tested whether students learned basic physics and chemistry concepts better by reading plain text or viewing pictures too and everyone do better with the help of pictures.

相似的研究测试了与纯文字相比，图文并茂的习方式生理解物理和化的基本概念是否有更好的帮助，结果显而易见。

And the U.S. ambassador to the United Nations says American remains locked and loaded to strike if more chemical attacks are carried out.

美国驻联合国大使说，如果实施更多的化武器袭击，美国人仍然会时刻准备反击。

I chose chemistry as my major in my college.

那时我选择化作为大的专业。

She finally received a postgraduate Bachelor of Science degree in 1947.

最终获得牛津大授予的化硕士位。

The energy density of lithium batteries has come a long way in the past few decades, but the chemical reaction on which they rely will never be able to match the energy available from the metabolisation of glucose.

过去的几十年间，锂电池的能量密集度取得了长足的发展，但是锂电池所依赖的化反应永远也无法产生与葡萄糖代谢所产生的能量相匹敌的数量。

But there are many chemical signals we give off—including ones that might signal alarm, aggression or other emotions.

我们散发出的化信号有许多种，包括那些传递警觉，攻击或者其他情绪的化信号。

These are hydro thermal vents and they spout a super heated cocktail of minerals and chemicals from deep within the earth crust. At temperatures up to four hundred degree Celsius.

这些是海底火山热液喷口，它们从地壳深处喷射出一种温度极高的矿物质和化物质的混合物，其温度高达摄氏四百度。

But I am a Ph.D student in Biochemistry study at Harvard, I now know a better, less painful and less risky treatment existed. So, I can’t help but ask myself, why I did’t receive one at that time?

不过我现是一个哈佛习生物化的博士生，我现知道了一个更好的、不那么痛、危险系数更小的治疗方法。所以，我忍不住问我自己，为什么那个时候我不能接受更好的治疗吗？

Being a chemist, I began working with my students to develop ways on performing chemistry directly on an individual DNA base, to truly fix, rather than disrupt, the mutations that cause genetic diseases.

作为一名化家，我开始和我的生们一起研究直接单个DNA基础上进行化反应的方法，真正修复而不是破坏导致遗传病的突变。

Those can be higher in industrial chemicals stored in fish bag.

这些可以是储存鱼袋里的工业化品。

Now what we believe happens is that the nerve cells in the brain, as a result of this force being applied, are stretched, and there's then a release of chemicals that changes the way that the brain works.

如今我们认为，大脑中的神经细胞外力施加时被拉伸了，之后释放的化物质改变了大脑工作的方式。