The more worrying changes are happening on a chemical level.
更令人担忧的变化发生在化学层面。
There are tens of thousands of proteins in the body that build and control life at the chemical level.
在我们的身体里存在着上万种蛋白质，它们以化学方式建立和支配生命。
The level of formaldehyde gas in her kitchen was twice the maximum allowed by federal standards for chemical workers.
她厨房的甲醛气体含量是联邦为化工工人设立的最大值标准的两倍。
Conversely, chemical engineers straight out of school can easily make almost four times the wages of an entry-level high-school graduate.
相反，刚从大学毕业的化学工程师的工资几乎是入门级高中毕业生的四倍。
They could also allow scientists to study chemical reactions at the single-molecule level.
它们还可以帮助科学家在单分子水平研究化学反应。
That's because on a molecular level, carbon is a wonderful chemical joiner.
这是因为就分子而言，碳是一种很好的化学物的结合体。
S.S.R.I.S are designed to help keep serotonin, a brain chemical, at a continuous level.
选择性5 -羟色胺再摄取抑制剂是用来帮助大脑中的一种化学成分——5 -羟色胺保持持续水平的。
The FDA said the low level of melamine was detected with the use of new technology that can detect minute traces of the chemical.
FDA表示，检测出这么低含量的三聚氰胺是因为使用了新的技术，这种技术能检测出微量的三聚氰胺。
The same dosage given to a woman can also raise her aggression level, but will not have the same degree of chemical effect as for a man.
如果把一定剂量的睾酮给一个女性，也能增加她的进攻性，但同等剂量对男人却不会有同样的化学效应。
The synthetic peptides, developed by a Harvard chemical biologist, have been described as a type of magic bullet that can deliver particularly potent doses of drugs at the cellular level.
这个由哈佛一名生化学家开发的合成肽据称能够像一种有魔力的子弹，能够在细胞水平上运载特定剂量的药物。
Nitrous oxide is stable at ground level but breaks down in the upper atmosphere to form compounds that trigger chemical reactions that destroy ozone.
一氧化二氮在地平面时是稳定的，但在高层大气中则分解而形成某种化合物，从而引发化学反应而破坏臭氧层。
Could it be that Oscar simply smelled an elevated level of a chemical compound released prior to death?
难道奥斯卡能够嗅出病人死亡前某些化合物水平的突然升高？
Powerful tools such as quantum-chemical computational models allow chemical engineers to build structures that can control reactions at the atomic level.
量子化学计算机模型已经建立，这是一种十分强大的技术手段，可让化学工程师制造出某种设备，以达到从原子水平上控制化学反应的目的。
Statins reduce the level of cholesterol in your blood by blocking an enzyme (chemical) in the liver that produces cholesterol.
他汀类药物通过抑制一种酶减少（化学在肝脏中产生胆固醇）在血液中的胆固醇水平。
The micro -scale construction of these materials is a key factor though, so chemical engineers must understand what is happening at the microscopic level.
而这些材料的微观结构是一个关键性因素，所以化学工程师必须在微观的层次上了解发生的一切。
An explosive chemical technique can now be used to identify individual molecules in biological samples, down to the single-cell level.
一项爆炸化学技术现在可被用于鉴定生物样品中的个别分子，其分析程度可达单个细胞水平。
For the first time, SRS microscopy makes possible label-free chemical movies, with streaming footage at the subcellular level, catching video of proteins, lipids, and water within cells.
本研究首次使利用SRS显微镜制作无标记化学影片成为可能：在亚细胞水平拍摄流水线式的连续镜头，捕获细胞内蛋白、脂质与水的视频图像。
The energy of activation is the minimum energy level that two colliding molecules must possess in order to undergo a given chemical reaction.
激活能就是使两个碰撞分子得以进行某特定的化学反应所必须具有的最低能级。
Although microbial contamination of food continues to account for the majority of instances of illness, consumers still have a high level of concern about chemical residues in food.
尽管细菌引起的食物污染仍然是造成疾病的主要原因，消费者们仍然非常担心食物中的化学残留。
Unraveling the differences between kinds of memories, Helmstetter believes, depends on understanding the chemical changes that happen in the brain at the molecular level.
区分各种记忆的不同依赖于理解在大脑分子水平的化学变化。
On the condition that the design service life is confirmed, the design reliability level of the chemical structures should include the corrosive environment and its effect on the structures.
因此，在设计基准期预先确定条件下，化工结构的设计可靠度水平应综合考虑腐蚀性环境及其对建筑结构的影响特点来决策。
Molecular collision and reaction dynamics is a subject of studying microscopic mechanism of chemical reaction in molecular and atomic level.
分子碰撞和反应动力学是在分子、原子水平上研究化学反应微观机理的一门学科。
Screen protection against radiation overdose of radioactive level gauge in chemical plant and the relevant national standards are introduced.
针对化工生产装置常用的放射性液位计和国家标准，介绍射线剂量超标的屏蔽防护方法。
The automation level in chemical industry, which is closely bound up with chemical processing equipments represents one of the significant signs in modern chemical enterprises.
化工自动化水平是现代化工企业重要标志之一，它与化工工艺设备息息相关。
Evolution of chemical matter and its level classification are not two irrelevant problems but two aspects of a problem.
化学物质的进化和化学物质的层次分类，是一个问题的两方面，而不是两个不相关的问题。
Based on the primary level of chemistry, the comprehensive chemical experiments are an important part of the new experimental teaching system of chemistry.
综合化学实验是建立在化学一级学科层面上，化学实验教学新体系的重要组成部分。
Based on the primary level of chemistry, the comprehensive chemical experiments are an important part of the new experimental teaching system of chemistry.
综合化学实验是建立在化学一级学科层面上，化学实验教学新体系的重要组成部分。
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