其中一些化学物质会赶走昆虫。
我们可能很难看到日常的化学作用，但几乎你接触的所有东西都有一些化学物质。
It can be very hard to see the everyday chemistry at work, but nearly everything you touch has some chemicals in it.
他们清洁我，并且给我添加一些化学物质。
吸烟者直接暴露在尼古丁及其他一些化学物质中。
Cigarette smokers are exposed directly to nicotine along with a number of other chemicals.
在动物研究中，人们已经把其中一些化学物质与哮喘和膀胱癌联系起来。
In animal studies, some of those chemicals have been linked with asthma and bladder cancer.
当我们在燃烧汽油和煤炭时，一些化学物质被释放到空气中。
When we burn gasoline and coal in cars and factories, certain chemicals are released into the air.
是指由于暴露在一些化学物质或除草剂而引发的青春痘类型。
Rash characterized by many comedones that develops from exposure to chlorinated chemicals or herbicides.
尽管如此，在食物链中引入一些化学物质还是引发了各种担忧。
Still, introducing modern chemicals into the food chain has raised concerns as well.
和一些化学物质一样，高温也能够破坏生物膜，但在这两种方法都不安全。
High temperatures can destroy biofilms, as can some chemicals, but neither approach is safe to use inside the delicate interior of a human tooth.
危害还不止这些，当汽车和工厂燃烧汽油和煤炭时，一些化学物质释放进入大气层。
There are other dangers. When automobiles and factories burn gasoline and coal, certain chemicals get into the air.
加工过程越多，加进去的糖、脂肪、盐以及一些化学物质也就越多，从而降解了其于健康的裨益。
The more processing that occurs, the more that food manufacturers add in sugar, fat, salt, and chemicals that reduce its healthfulness.
人到中年，脑袋的加工处理信息的速度下降，大脑的神经传递素也逐渐衰弱，大脑的一些化学物质也开始走下坡路。
There are declines in processing speed and in neurotransmitters, the chemicals in our brain.
一个是直接原因：运动能使大脑产生一些化学物质从而调节情绪；另一个是间接原因：是由机体形象的改善和自我评价的提高而产生的。
One is the direct effect that exercise produces chemicals in the brain that affect mood, and the other is the indirect impact through enhanced body image and self-esteem.
正如表面涂着含铅油漆的芯片可能会导致儿童丧失学习能力，地下室的氡含量过高可能会使人患上肝癌，一些化学物质和其他室外因素也可能是自闭症形成的诱因。
Just as lead paint chips can cause learning disabilities and radon in the basement can cause lung cancer, certain chemicals and other outside influences seem to help set autism in motion.
科学家们认为人类造成臭氧层破坏的主要原因是一些化学物质，像氯氟碳，当它们到达平流层后会分解成氯和溴，然后和臭氧发生化学反应从而破坏臭氧层。
The problem with the ozone layer is that when certain chemicals, like chlorofluorocarbons, reach the stratosphere, they break down into chlorine and bromine, which react with the ozone and destroy it.
为了生产出炸薯条，必须把它们加热到很高的温度，这会放出一些化学物质如acrylimide. Acrylimide是一种致癌介质，它同样会引起神经损伤。
In order to make French fries, they must be cooked at high temperatures which cause the chemical, acrylimide to be released. Acrylimides are a known cancer causing agent that also causes nerve damage.
信息素和odorants （被检测为气味的化学物质）之间的区别可能是模糊的，一些研究人员将信息素归类为一种 odorant。
The distinction between pheromones and odorants—chemicals that are consciously detected as odors—can be blurry, and some researchers classify pheromones as a type of odorant.
受惊吓时会让你的大脑充满一些健康的化学物质，能刺激你情绪，让你十分兴奋。
Being frightened makes your brain flood with healthy chemical substances that excite your mood and release feelings of great excitement.
营销协调员担心一些普通塑料中的化学物质可能会对她的身体产生影响。
The marketing coordinator was concerned about what the chemicals coming out of some common types of plastic might be doing to her body.
有些科学家有预感，认为孕妇的饮食和她接触的各种化学物质会开启一些胎儿基因，而关闭其他基因。
Some scientists have a hunch that a pregnant woman's diet and her exposure to various chemicals turn on some fetal genes and turn off others.
但当我们用化学方法分析这些细胞时，我们发现了一些非常有趣的东西，其中有一种化学物质，是一种叫做端粒酶的酶。
But when we analyze these cells chemically, we find something very interesting, a chemical in them, an enzyme called telomerase.
例如，一些毒液基于化学物质，而另一些基于细菌，所以它们显然是由不同的途径产生的，可能不像我们想象的那样密切相关。
For example, some venoms are chemical-based, and others are bacteria-based, so they clearly had to have developed along different routes and may not be as closely related as we thought.
他们给其中一些作品注入了起稳定和加固作用的化学物质。
They infused some with stabilizing and consolidating chemicals.
很明显，有一些不属于我们身体的化学物质存在在我们身体中。
Clearly, there are chemicals in our bodies that don't belong there.
研究人员发现，一些电子产品在夜间发出的人造光可能会减少大脑中有助于睡眠的化学物质。
Researchers find that man-made light from some electronic products at night may reduce the brain chemicals that help sleep.
这些化学物质中的一些对人类极其危险，因为它们酷似人体天然所需的物质(如碘)，并极易进入人体的组织。
Some of these chemicals are especially dangerous to humans because they mimic substances the body naturally USES, such as iodine, and are readily incorporated into the body's tissues.
问题：我一直都引用瓶装水，但是不停听到，一些瓶子含危险的化学物质。
Q: I drink bottled water all the time, but I keep hearing that some bottles contain dangerous chemicals.
监督部门发现，一些童装中含有会导致皮肤问题的化学物质。
The watchdog found that some baby clothes contained chemicals that could cause skin problems, the newspaper said.
监督部门发现，一些童装中含有会导致皮肤问题的化学物质。
The watchdog found that some baby clothes contained chemicals that could cause skin problems, the newspaper said.
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