在化学变化中，一种物质变成另一种完全不同的物质。
During a chemical change, one kind of matter changes into another completely different kind of matter.
第一次在化学实验室上课时，我惊讶地发现学生们都“全副武装”了起来。
The first time I took a class in the chemistry lab, I was surprised to find that students were fully "armed".
我们在化学中所做的很多都是在恒定的温度和压强下进行的。
So much of what we do in chemistry does take place with constant temperature and pressure.
这是在化学家路易斯·德比尔内的帮助下实现的，而他是皮埃尔·居里的学生之一。
This was achieved with the help of the chemist Louis Debierne, one of Pierre Curie's pupils.
一个人的腋窝会产生全部的吸引力，一些块菌就是利用了这样一种人性的特性——至少在化学家看来是这样的。
A person's armpits have all the appeal, and some truffles take advantage of such a human nature—at least to chemists.
我在化学方面是个劣等生。
你在化学方面有困难吗？
高果糖玉米糖浆中，葡萄糖和果糖分子在化学上是分开的。
In high-fructose corn syrup, the glucose and fructose molecules are chemically separate.
到那时，人们期望生物燃料将与现有炼油厂生产出来的燃料——即碳氢化合物在化学上类似。
By then, the expectation is, biofuels will chemically resemble the stuff that pours out of existing oil refineries-ie, hydrocarbons.
这项研究是由负责健康和营养研究的Hershey中心的科学家得出的，但是发表在化学核心期刊上。
The study was conducted by scientists at the Hershey Centre for Health &Nutrition, but was peer reviewed and published in the Chemistry Central Journal.
在化学计算中我们很少，用英里每小时，所以我们把它换算为42米每秒，对不起，它是94英里每小时。
We don't usually do our chemistry calculations in miles per hour, so let's switch that to 42 meters per second, so it's — sorry, it's 94 miles per hour.
铜（29），镍（28），锌（30）在化学周期元素表中紧挨着彼此，并且它们还拥有一些相同的特性。
AS WELL as being close to each other on the periodic table, copper, nickel and zinc share several traits.
如果我们只能搞清楚所有的东西，仅仅是在化学物理行为和科学元素中，所有这些元素，我们会知道所有这些，了解人类。
If we only could figure all out in terms of the chemical, physical and behavioral, scientific elements, all of these elements, we'd know all this knows about human being.
这些理论如此成功地解释了元素很广泛的化学性质，以致于，人们逐渐认为：在化学上，“单原子气体电子构型”不可违背。
So successful were these theories in accounting for a wide range of chemical properties of the elements that the monatomic-gas electron configurations came to be thought of as chemically inviolate.
乙醇在化学上的性质与水相似，它能以自己独有的方式进入到细菌的细胞质当中，在这里，它会瓦解蛋白质并杀死细胞。
Alcohol is chemically similar to water, so it can work its way into bacterial cytoplasm, where it makes the proteins fall apart, killing the cell.
这种化学制品在工业上用途广泛。
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。
Textile dyes, such as indigo, were mostly of plant origin until the advent of synthetic chemical dyes.
他在研究化学。
在美国化学协会杂志刚发表的一篇论文《纳米》表示加入少许石墨烯也许就能解决这个问题。
A paper just published in the American Chemical Society's journal, Nano suggests a sprinkling of graphene may deal with this problem.
昨天，在美国化学协会的一个会议上，DrNeilDaCosta 发表了他关于血腥玛丽的研究，说：“这是一种很复杂的饮料。”
Dr Neil Da Costa, who presented his research on the Bloody Mary at a meeting of the American Chemical Society yesterday, said, "It's a very complicated drink."
在19世纪发现化学染料之前，靛蓝一直被高度重视。
The indigo plant was highly valued until the discovery of chemical dyes in the 19th century.
当一辆装满化学物质的卡车在隧道中起火并爆炸时，霍兰德的系统受到了严峻的考验。
Holland's system received a severe test when a truck loaded with chemical substances caught fire in the tunnel and exploded.
这是通过一个复杂的化学信使系统来完成的，在植物中包括激素和其他调节分子。
This is accomplished by a complex system of chemical messengers that in plants include hormones and other regulatory molecules.
冲击波是在易挥发的化学品爆炸时产生的。
科学家们也在努力研制化学物质来控制鹿群的出生率。
Scientists are also working to develop chemicals to control the birth rate in deer populations.
这种方法的依据是测量饮用水中的化学物质在人的头发中的变化。
The method relies on measuring how chemical variations in drinking water show up in people's hair.
也许对于护理行业，尤其是医学行业，在选拔时应该少考虑化学方面的好成绩，多考虑善解人意和同情心之类的因素。
Perhaps selection for the caring professions, especially medicine, could be made less by good grades in chemistry and more by such considerations as sensitivity and sympathy.
坦桑尼亚政府再次开始在湖中开采纯碱，用于制造化学品、玻璃和洗涤剂。
The Tanzanian government has once again started mining the lake for soda ash, used for making chemicals, glass and detergents.
坦桑尼亚政府再次开始在湖中开采纯碱，用于制造化学品、玻璃和洗涤剂。
The Tanzanian government has once again started mining the lake for soda ash, used for making chemicals, glass and detergents.
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