Chemicals make up everything we use or consume, and knowledge of the chemical position of many substances is important in our daily lives.

我们所使用和消耗的一切都是由化学物质组成的，所以日常生活中了解物质的化学成分是非常重要的。

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Koch Chemical promoted her to a permanent position after her trial period expired in mid-2008, court records show.

法庭记录显示，在她2008年中试用期到期后，科赫化工提升她到了一个固定职位。

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Koch Chemical Technology Group, a Koch Industries subsidiary run by David Koch, hired Egorova-Farines in April 2008 for the newly created position of compliance and ethics manager for Europe and Asia.

科赫工业公司的分支机构由大卫·科赫经营的科赫化工技术集团于2008年4月聘用叶格罗娃-法利娜（Egorova- Farines）作为新职位欧亚地区道德合规经理。

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So, a protein that has tyrosine and it has tyrosine in a position such that it's on the outside of the protein and accessible to chemical reaction can be phosphorylated.

所以,一种蛋白质中含有酪氨酸,并且该酪氨酸位于,像蛋白质的外侧这样的位置,这样才能够发生磷酸化反应

耶鲁公开课 - 生物医学工程探索课程节选

Some proteins can be switched from an 'off' position where they don't do anything to an 'on' position where they now do something by only a chemical reaction like this where a phosphorous is added.

一些蛋白质可以从关闭状态的,无所作为,到成为开启状态后,执行某种功能,中间只发生了一个引入磷酸基的化学反应

耶鲁公开课 - 生物医学工程探索课程节选

Considerations such as these in 1987 prompted every involved agency of the United States government to recommend that the formal U.S. position seeking a global ban on chemical weapons be abandoned.

CENTERFORSECURITYPOLICY: Center for Security Policy | Submitted Testimony Of Frank J. Gaffney, Jr. Before A Joint Hearing Of The Senate Governmental Affairs Committee And The Permanent Subcommittee On Investigations

As a result, in the latter part of that year, every relevant agency in the U.S. government concluded that the United States needed to alter its position on the desirability of quickly reaching such a comprehensive chemical weapons ban.

CENTERFORSECURITYPOLICY: Center for Security Policy | Banning Chemical Weapons: Negotiating Unilateral US Disarmament

This is occurring despite the recommendations of U.S. negotiators against preparing accords on strategic forces, conventional forces in Europe and chemical weapons under an artificial deadline and mounting evidence that the Soviet military is hardening its position in the arms talks to achieve tactical advantages under these circumstances.

CENTERFORSECURITYPOLICY: Center for Security Policy | Time For A ��Sanity Check��: Do Hasty US Concessions To Gorbachev Make Sense?