What is the chemical symbol for copper?
铜的化学符号是什么？
Fire spread rapidly after a chemical truck exploded.
一辆装有化学品的卡车爆炸后火势迅速蔓延开来。
You can ask for a chemical analysis of your tap water.
你可以要求给你的自来水做化学分析。
He said chemical weapons had never been sited in Germany.
他说从未在德国部署过化学武器。
I understand that your company has a chemical processing plant.
我了解到，贵公司有一个化学加工厂。
A lot of poisonous waste water comes from that chemical factory.
那个化工厂排出大量有毒的废水。
Well, I understand that your company has a chemical processing plant.
我知道贵公司有一个化学加工厂。
There are several chemical factories pouring waste water into the stream.
有几家化学工厂把污水排入河里。
The factories cannot afford to finance chemical treatment plants by themselves.
工厂自身负担不起化学处理厂的费用。
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。
Such a war could result in the use of chemical and biological weapons.
这样一场战争可能导致生化武器的使用。
Reductive Alkylation is a process often seen in chemical production.
还原性烷基化是化工生产中常见的过程。
黛安娜是名化学老师。
它不是化学反应。
You could be a chemical engineer.
你就可能成为一个化学工程师。
We think about chemical potential.
我们考虑化学势。
If you want the chemical potential.
如果你想知道化学势。
That's just the chemical potential.
这是化学势。
So chemical residues are rarely found.
因此，很少发现有化学残留物。
So let's look at the chemical potentials.
让我们来看化学势。
What can we say about chemical reactivity?
我们对化学反应了解些什么呢？
Another popular chemical is tri-butyl tin.
另一种流行的化学物质是三丁基锡。
In the chemical industry, they are routine.
而在化工行业，这样的起落已成为常规。
So, how would we describe a chemical reaction?
我们如何描述一个化学反应？
Because the chemical potential is lower inside.
因为里面的化学势低。
This is a chemical change, not a physical one.
这是一个化学变化，而不是物理变化。
We were the first chemical company in Western China.
我们是中国西部第一家化工企业。
TEACHER: What is the chemical formula for water?
老师：水的分子式是什么？
TEACHER: What is the chemical formula for water?
老师：水的分子式是什么？
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