化学是研究物质的组成、结构、性质、变化及合成的自然科学。
Chemistry is a natural science that studies the form, structure, property, change and compose of substance.
化学是研究物质的组成、结构和性质以及物质所发生的变化的科学。
Chemistry is the study of the composition, structure, and properties of matter, and the changes that matter undergoes.
物理学家继续将已知的宇宙切成粒子来研究从磁力学到何种物质组成了它们和它们是怎么保持稳定的万事万物。
Physicists continue to carve the known universe into particles to describe everything from magnetism to what atoms are made of and how they remain stable.
地质学研究地球的物质组成、地球的结构及地球的形成过程。
Geology deals with the composition of Earth materials, Earth structures, and Earth processes.
这将大大强化研究人员确定发现了一些理论家看作是暗物质的主要组成部分的互相作用很弱的大量粒子的案例。
That would considerably strengthen the case that researchers have indeed detected the weakly interacting massive particles that some theorists have proposed as the main building block of dark matter.
研究者还发现有氧小组成员中他们血液中一种重要的给大脑施肥的化学物质脑源性神经营养因子有了明显的增加。
The researchers also saw a significant increase in that important brain-fertilizing chemical BDNF in the plasma of those in the aerobic exercise group — but not in the control group.
对于考古学家来说幸运的是，由化学物质组成的沼泽将尸体保存得非常好，使得考古学家们能深入研究这些不幸的沼泽尸体。
Lucky for archaeologists, the chemical make-up of a bog preserves human flesh very well, allowing them to study the unlucky bog bodies closely.
然而，在后来的近40年里，研究人员仍然每能弄清暗物质的组成。
Yet, in the nearly 40 years that followed, researchers still haven't been able to figure out what dark matter is made of.
一项最新的研究发现，在人类的肌肤油脂中含有某些物质，它们是室内灰尘的重要组成成分。
Substances in human skin oil are significant components of indoor dust, a new study found.
一个由各国专家所组成的小组在分析了十多份已出版的研究报告之后指出，手机被定性为“可能致癌的物质。”
An international panel of experts says cellphones are possibly carcinogenic to humans after reviewing details from dozens of published studies.
这种猪流感病毒的遗传物质组成与研究人员曾经遇到了任何一种都不一样。
The genetic make-up of this swine flu virus is unlike any that researchers have seen.
研究这些恒星的化学组成有助于科学家了解组成我们地球和其他行星的物质，很久以前是怎样离开恒星的诞生地(到达我们太阳原始星云)的。
Studying the chemistry of the stars helps scientists learn how the matter that makes up our earth and other planets in our galaxy left its stellar birth places long ago.
巴黎：CERN（欧洲粒子物理研究所）的科学家们声称他们捕获了少量反氢原子，这无疑是一项重大的技术突破，将允许他们探索宇宙是物质组成的原因。
PARIS: Scientists at CERN said they've trapped dozens of anti-hydrogen atoms, a technical breakthrough that will allow them to explore why the universe is made of matter.
介绍了柑橘果实皮和汁中芳香物质的提取、组成、鉴定等方面的研究进展情况。
This review introduces research progresses in citrus aromatic substances, their distilling, composition and identification.
在对不同矿石类型的物质组成物化性能研究基础上，科学合理地指出了该矿床的开发利用方向。
On the basis of studying the physical and chemical characteristics of pyrauxite ores, the development direction of the pyrauxite deposit was put for ward.
本文对高硫含金矿石的物质组成、结构进行了研究。
In this paper, the composition and structure of gold ores containing high sulphur were studied.
中低品位磷矿床的物质组成及工艺矿物学特征是合理利用磷矿资源重要的研究内容。
Mineral component and process mineralogy characteristic of middle and low grade phosphate deposit are important study objects for reasonable phosphate resource usage.
生化药品标准物质是其质量控制体系的重要组成部分，也是当前药品质控研究的热点和重点之一。
The standard materials for the quality control of biochemical drugs are important, and also the hotspot and the emphasis in current pharmaceutical quality control study.
对茂名高岭土的物质组成、白度、粒度组成、粘浓度、含砂量等造纸涂布性能进行了研究。
This paper deals with the compositions, brightness, size distribution, viscosity concentration and the content of sand of Maoming kaolin.
研究了导致竹汁产生沉淀的非生物因素，分析了沉淀物质的组成及不同处理对沉淀产生的影响。
Non-biological factors causing precipitation of bamboo juice were studied and the composition and mechanism of the precipitation were analyzed.
本文就笔者搜集到的几种不同的膨胀土样进行了基本特性研究，如物质组成、物理化学性质、微观结构等。
The basic properties of some expansive soils such as composition, physic-chemical properties and microstructure etc. are studied in this paper.
这一实验结果对大陆地区岩浆起源和深部地壳物质组成的研究可能有新的启示。
This experimental conclusion is of great significance to understanding of the continental magma origins and the deep crust compositions.
通过麻粒岩地体以及火山岩中麻粒岩捕掳体的研究，使人们对地球深部的物质组成和结构有了直接的了解。
By research of granulite terranes and granulite xenoliths in volcanic rocks, composing and structure of deep substance in the earth could be realized directly.
在对昆明某地玄武岩红土进行现场勘察的基础上，对其剖面的物质组成取样进行了研究。
This paper analyses the substance compositing of the basalt laterite section, based on site investigation the basalt laterite in Kunming area.
稀有气体同位素组成研究证实CCSD及其周围HP-UHP变质岩曾经历的板块俯冲和折返过程非常快速，俯冲过程中的壳幔物质交换未能充分进行。
The noble gas isotopic compositions imply that the subduction and exhumation of the CCSD HP-UHP rocks may be very quick, thus the mantle-crust interaction and isotopic exchange might be very limited.
国家研究实验基地文化由物质文化、制度文化、精神文化三个层面组成，是三种文化的有机统一体。
The culture of the state base of the research and experiment are consisted of the material culture, the institutional culture and the spiritual culture, which are organically unified.
对西安市路面积尘粒径分布和不同粒径中矿物质量组成的研究表明，路面积尘质量主要集中在30～50目（0。
Study on road dust with grain diameter distribution and mineral composition of various grains in Xi'an demonstrated that road dust mainly existed in grains with a diameter of 30~50 mesh(0.
对西安市路面积尘粒径分布和不同粒径中矿物质量组成的研究表明，路面积尘质量主要集中在30～50目（0。
Study on road dust with grain diameter distribution and mineral composition of various grains in Xi'an demonstrated that road dust mainly existed in grains with a diameter of 30~50 mesh(0.
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