每一种化学物质都是一把打开天堂和地狱之门的钥匙。
Every chemical substance is a key to the gates of heaven and hell.
科学家们发现植物之间一直在交流。他们的语言是一种化学物质。
Scienists have found that plants talk to each other all the time. Their language is a kind of chemical.
为了使一种化学物质被认为是一种药物，它必须具有影响人体运作的能力。
In order for a chemical to be considered a drug, it must have the capacity to affect how the body works.
科学家并不知道是什么导致丙烯酰胺的形成，但是他们相信它是在烘焙、油煎、烧烤或烘烤过程中产生的一种化学物质。
Scientists do not know what causes acrylamide to form but they believe it occurs as a result of a chemical process during baking, frying, or grilling.
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.
为了研究大麻素的作用，研究人员给新生老鼠注射了一种化学物质，这种化学物质可以阻止大麻素到达它们大脑中的受体。
To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoides from reaching their receptors in the brain.
A：烟瘾是一种化学物质吸食成瘾，很难治疗。
A: Addictions are difficult to treat because of the biochemical dependencies our bodies have made to the addicting substance.
椰菜中含有一种化学物质，可由人体转换成萨夫若芬。
Broccoli contains a chemical that the human body changes into sulforaphane.
有些杏仁含有一种化学物质氢氰酸，它的名称缩写是HCN。
Some almonds do contain a chemical called hydrocyanic acid, abbreviated as HCN.
已经发现一种化学物质，可能是揭开帕金森氏病奥秘的钥匙。
A chemical has been discovered that may be the key to unlocking the mysteries of Parkinson's disease.
例如，当受伤时，有很多种鱼会释放一种化学物质，让其他鱼逃跑。
For instance, a large group of fishes release a chemical when they're wounded that incites other fish to flee.
如果我们把一种化学物质和其他化学物质混合就能得到一种新物质。
We can get a new substance if we incorporate a chemical substance with others.
第二套样本中包含有铜绿――在一个石灰石盒子上附着的一种化学物质。
The second set consisted of patina ― a chemical film encrustation on one of the limestone boxes.
去甲肾上腺素是一种化学物质，提高我们的情绪，并作用在协力和焦虑上。
Noradrenaline is a chemical that elevates our moods and affects stress and anxiety. The more concentrated the amounts of these two chemicals, the happier we are!
处于干细胞形态的一种化学物质鸡尾酒曾经被用来将细胞培育成新的细胞类型。
Once in a stem cell-state, a cocktail of chemicals was used to make the cells develop into a new cell type.
当NRF2活跃时，细胞能合成一种化学物质叫谷胱甘肽，一种重要的抗氧化剂。
When NRF2 is active, cells synthesize a chemical called glutathione, an important antioxidant.
基于对发作性睡病患者的研究，研究人员指出一种化学物质将对夜间失眠患者有帮助。
By learning from patients who nod off unexpectedly during the day, researchers have pinpointed a chemical that could help people who can't sleep at night.
当我们看到其他人失败，有时候大脑的背纹状体会产生一种化学物质使我们感到愉快。
When we see others fall, it sometimes causes a chemical to be released in the dorsal striatum of the brain, which actually causes us to feel pleasure.
人们对于这项法案的批评是，这项法案假设一种化学物质是安全的，直到它被证明具有毒性。
People's criticism of that law is that it has tended to treat chemicals as safe until proven to be dangerous.
其他游戏例如生物弹珠球，通过注射一种化学物质到液体环境中使得草履虫向不同的方向游走。
Other games, such as biotic pinball, work by injecting a chemical into the fluid causing the paramecia to swim in different directions.
研究人员从小麦中提取的一种化学物质可以抵制菟丝子，所以有可能找到新办法来抗击这种杂草。
The researchers isolated a chemical in wheat that repels dodder. This could lead to new ways of fighting the weed.
但是他们一直不断地吸烟是因为他们对尼古丁上瘾了，一种香烟里的或者是无烟烟草里的一种化学物质。
But they keep on smoking because they became addicted to nicotine, one of the chemicals in cigarettes and smokeless tobacco.
内啡肽是人体自身释放的一种化学物质，用来帮助减压、镇痛，同时会让人产生一种幸福、快乐的感觉。
Endorphin is a natural chemical produced in the body that helps reduce stress and pain, creating a general sense of well being and happiness.
加拿大医学协会杂志上的一篇评论文章警告称葡萄柚中的一种化学物质可以与某些药物相互反应而致命。
A review article in the Canadian Medical Association Journal warns that a chemical in grapefruits can interact lethally with certain medicines.
在社会性的小鼠大脑中发现，褐色脂肪的增加可能还归因于大脑中的一种化学物质，称为脑源性神经营养因子。
Increased levels of brown fat may also be attributed to an increase in a brain chemical called brain-derived neurotrophic factor [BDNF] found in the sociable mice.
科学家并不确定是什么导致丙烯酰胺的形成，但是他们相信这是在烘焙，油煎，烧烤或烘烤过程中产生的一种化学物质。
Scientists do not know exactly what causes acrylamide to form but they believe it occurs as a result of a chemical process during baking, frying, grilling or toasting.
有一些研究表明DEHP(邻苯二甲酸二辛酯)，（静脉输血袋中用的）乙烯基中包含的一种化学物质具有这样的特性。
And there's some research showing that DEHP, this chemical that's in vinyl [used in IV bags], has this property.
有一些研究表明DEHP(邻苯二甲酸二辛酯)，（静脉输血袋中用的）乙烯基中包含的一种化学物质具有这样的特性。
And there's some research showing that DEHP, this chemical that's in vinyl [used in IV bags], has this property.
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