Is just a chemical reaction that compels animals to breed.

不过让动物繁衍后代的化学反应罢了。

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.

对于动物和人类的研究都显示出性激素会在某种程度去影响面对压力的反应，导致在同样的条件下，女性产生更多的致病化学物质。

Some of the early names referred to their chemical properties.

早期的一些名字提到了它们的化学特性。

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

听着，她在你的化学课上，不吗？你擅长化学。

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

大学毕业后，我从事化学染料的开发工。

The disposal of chemical waste is a serious problem.

化学废弃物的处理项严重的问题。

Output of autos, home electronics and chemicals all rose.

汽车、家以及化学品的产出率均上升。

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，食品制造商们了大量的化学药品，硫酸铜，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。对了，我想确认一下在实验室分析那些样品时使的化学制剂，我们的铬酸钾和硝酸银，对吗？

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，图文并茂的学习方式对学生理解物理和化学的基本概念否有更好的帮助，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，如果实施更多的化学武袭击，美国人仍然会时刻准备反击。

I chose chemistry as my major in my college.

那时我选择化学为大学的专业。

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

她最终获得牛津大学授予的化学硕士学位。

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.

在过去的几十年间，锂池的能量密集度取得了长足的发展，但锂池所依的化学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.

我们散发出的化学信号有许多种，包括那些传递警觉，攻击或者其他情绪的化学信号。

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学物质的混合物，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?

不过我现在一个在哈佛学习生物化学的博士生，我现在知道了一个更好的、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.

为一名化学家，我开始和我的学生们一起研究直接在单个DNA基础上进行化学反应的方法，真正修复而不破坏导致遗传病的突变。

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

这些可以储存在鱼袋里的工业化学品。

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，大脑中的神经细胞在外力施加时被拉伸了，之后释放的化学物质改变了大脑工的方式。