The chemical companies had amalgamated into a vast conglomerate.
这些化学公司已经合并成了一个巨型企业集团。
We must reduce the danger of war by controlling nuclear, chemical, and conventional arms.
我们必须通过控制核武器、化学武器和常规武器来降低战争的危险。
Professor Orr has developed interesting ways of tagging chemical molecules using existing laboratory lasers.
奥尔教授已经研发出了用现有的实验室激光给化学分子贴标签的有趣方法。
Photoreceptors are cells that respond to light by sending out a chemical signal.
光感受器是通过发出化学信号来对光作出反应的细胞。
It's a protein, a specific kind of protein, one that speeds up chemical reactions.
它是一种蛋白质，一种特殊的蛋白质，可以加速化学反应。
You could work for the R&D divisions of large chemical companies like DuPont or BASF.
你可以去杜邦或巴斯夫这样大型化工企业的研发部门工作。
The indigo plant was highly valued until the discovery of chemical dyes in the 19th century.
在19世纪发现化学染料之前，靛蓝一直被高度重视。
Textile dyes, such as indigo, were mostly of plant origin until the advent of synthetic chemical dyes.
在合成化学染料出现之前，诸如靛蓝之类的纺织染料主要来源于植物。
She invented and patented special arrangements of mirrors and concocted chemical dyes for her draperies.
她发明了镜子的特殊排列并申请了专利，还为她的布料调配了化学染料。
I figured chemical engineering would be the best way to get into new energy because it's a really broad major.
我发现化学工程应该是接触新能源的最好方式，因为这个专业覆盖面很广泛。
In Ludwigshafen, German chemicals giant BASF runs an interconnected complex of more than 200 chemical factories.
在路德维希港，德国化工巨头巴斯夫经营着一个由200多家化工厂组成的相互关联的综合企业。
I like the fact that organic farms don't use chemical pesticides or anything that can pollute the soil or the water.
我喜欢有机农场不使用化学农药或任何会污染土壤或水的东西。
If you think of the many colours, shapes and textures around us, they are all the product of specific and unique chemical reactions.
如果你想想我们周围的许多颜色、形状和质地，它们都是具体而独特的化学反应的产物。
You see, it turns out that certain microorganisms are chemosynthetic—they don't need sunlight because they take their energy from chemical reactions.
你看，原来某些微生物是化学合成的——它们不需要阳光，因为它们从化学反应中获取能量。
Both chemists were sufficiently farsighted to leave gaps where their analyses of periodic physical and chemical properties indicated that new elements should be located.
这两位化学家都非常有远见，他们对周期性的物理性质和化学性质进行分析，并在预示应该出现新元素的地方留下了空位。
The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.
这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。
Scientists first posed this question in the mid-1990s, after researchers came upon a chemical agent that in rodents seemed to reproduce many of caloric restriction's benefits.
科学家首次提出这个问题是在20世纪90年代中期。当时，研究人员偶然发现一种化学药剂，这种药剂在啮齿动物身上似乎可以发挥和热量限制相同的正面效果。
It has been proved that Low Till Farming increases harvests and reduces water use, and this method reduced the need for chemical products because there are fewer unwanted plants.
实践证明，低耕农业提高了作物产量，减少了用水量；而且，由于有害植物变少了，这种农业对化工产品的需求也降低了。
Because of her efforts, dozens of toxic sites across the country have been cleaned up, and one chemical industry spokesperson calls her "a top gun for the environmental movement".
由于她的努力，全国数十个包含有毒物质的区域已被清理干净，一位化工行业发言人称她为“环保运动的先锋”。
This discovery led Perkin to start a company using this chemical mixture to make purple dye.
这一发现促使珀金创办了一家公司，使用这种化学混合物来制造紫色染料。
When people do something new or risky, a chemical (化学物质) in the brain creates a pleasant feeling.
人们尝试新鲜事物或是冒险性举动时，大脑中的某种化学物质会让人产生愉快感。
"We're thinking about how we can engineer plants to replace functions of the things that we use every day," explained Michael Strano, a professor of chemical engineering at MIT.
麻省理工学院化学工程教授迈克尔·斯特拉诺解释道：“我们正在思考如何设计植物来代替我们日常使用的东西的功能。”
An interesting thing is that our brain will release a pleasure-related chemical when it has been given new information, making seeking information much like eating—another pleasant activity.
有趣的是，当我们的大脑得到新信息时，它会释放一种与快乐相关的化学物质，使得寻找信息成为像进食一样的另一种惬意活动。
This is a "feel good" chemical that is produced in your body.
这是一种在你身体里产生的、可以使你“感觉很不错”的化学物质。
In the fall, she's going to Harvard to study chemical engineering.
今年秋天她将上哈佛大学学化学工程。
That is why chemical engineers are among the best-paid new graduates.
这就是为什么化学工程师是应届毕业生中薪酬最高的职业之一。
This saves valuable chemical propellant and extends mission lifetime.
这样既可以节省珍贵的化学燃料，又可以延长航天器的寿命。
Ants solve their own version using chemical signals called pheromones.
蚂蚁用一种叫做信息素的化学物质来解决它们自己的“旅行商问题”。
A leaf is a beautiful thing. It is also a wonder of chemical engineering.
一片树叶是如此美丽，它是化学工程的奇观。
A leaf is a beautiful thing. It is also a wonder of chemical engineering.
一片树叶是如此美丽，它是化学工程的奇观。
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