Is just a chemical reaction that compels animals to breed.

不过是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。

The U.S. ambassador to Syria says the U.S. has no evidence yet the chemical weapons have been used in the conflict.

美国驻叙利亚大使表示，目前美国尚无证据证实叙利亚冲突中使用了化学武器。

Some of the early names referred to their chemical properties.

早期的些名字提到了它们的化学特性。

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。

I'm John Keener.I'm a former research biochemist and former council member and Mayor of Pacifica.

我是约翰·基纳，我以前是研究生物化学家，前帕西菲卡委员会议员和帕西菲卡市长。

The disposal of chemical waste is a serious problem.

化学废弃物的处理是项严重的问题。

Chemistry, literature, peace and economics come next.

化学奖、文学奖、和平奖和经济学奖随后公布。

Output of autos, home electronics and chemicals all rose.

汽车、家用电器以及化学品的产出率均上升。

This concentration gradient is extremely important for setting the resting membrane potential of excitable cell membranes, which is needed for normal contraction of smooth, cardiac, and skeletal muscle.

电化学梯度在可兴奋细胞膜静息电位的形成中十分重要，而平滑肌，心肌还有肌的收缩都需要可兴奋细胞膜的参与。

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，硫酸铜，是种杀虫剂，它能让罐装的豆子看起来很绿很鲜亮。

But increasingly these remedies do not work. Scientists say that's because lice have developed tolerance and even resistance to chemicals.

但是这些药物逐渐失去效果。科学家表示，这是因为虱子产生了耐力，甚至能够抵抗这些化学药物。

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？

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是否有更好的帮助，结果显而易见。

Cigarette smoke contains 69 chemicals that are known to cause cancer.

香烟含有69种致癌化学物质。

So they emit a chemical substance that alerts the other bees.

所以它们会释放种化学物质警告其它蜜蜂。

Each ant is armed with a chemical weapon.

每只蚂蚁都装备了化学武器。

San Francisco said it makes sense that microplastics are harmful because they contain poisonous chemicals.

旧金山说，微塑料有害是有道理的，因为它们含有有毒化学物质。

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。

You're a graduate chemist, can't you just work it out?

你自己就是个高级化学师 就不能自己解决吗?