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.
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.
本文分析了血袋中还原物质的组成，并对其安全性做出了初步评价。
This paper analyzed the composing of reducing substances and had a primary safety assessment on them.
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.
这些副产品是能影响情绪、胃口、新陈代谢、炎症和免疫系统的化学物质的组成成分。
These byproducts are essential components of chemicals that affect mood, appetite, metabolism, inflammation and the immune system.
化学是一门以实验为基础的自然科学。它以物质的组成、结构、性质及变化规律为研究对象。
Chemistry, which regards the composing, the configuration, the characters and the change rule of matter as its research objects, is a natural science that bases on experiment.
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.
采用分步加热法收集慢源岩流体包裹体中的气态物质，并用质谱计分析了这些气态物质的组成。
Gases from mantle xenoliths have been collected by step-heating method and have been analysed by MS.
结果表明，适当的温度和压力相结合，既能缩短啤酒发酵周期，控制啤酒风味物质的组成，又不影响啤酒风味。
The results suggested that adequate temperature and pressure could shorten beer fermentation period and control beer flavoring substances with no adverse influence on beer flavor.
本文介绍了葡萄中芳香物质的组成、分布、成熟过程中芳香物质的变化以及加工工艺对葡萄芳香物质的影响等方面的研究进展情况。
This review introduced researching progresses of grape aromatic substance in its composition, distribution, changing in development and effects of processing on grape aromatic substance.
尽管它的视觉效果如此显著，但尘埃只是位于恒星之间的物质的一个次要组成部分，其密度极低。
Although its visual effect is so pronounced, dust is only a minor constituent of the material, extremely low in density, that lies between the stars.
它们的确是星云物质组成的团块，其组成物质可能与行星形成时的物质相似。
They are truly lumps of nebular matter, probably similar in composition to the matter from which planets were assembled.
石油由原油和天然气组成，它们似乎来源于海洋沉积物中的有机物质。
Petroleum, consisting of crude oil and natural gas, seems to originate from organic matter in marine sediment.
石墨烯最早在2004年诞生于一个实验室，本质上是一层由纯碳原子组成的蜂窝状晶格层，薄到竟被认为是二维物质。
First produced in a lab back in 2004, graphene is essentially a single layer of pure carbon atoms bonded together in a honeycomb lattice so thin it's actually considered two-dimensional.
食物中的许多化学物质是健康饮食的必要组成部分。
Many of the chemicals in food are necessary parts of a healthy diet.
面包含有碳水化合物，这是一种由碳、氢和氧组成的化学物质。
Bread contains carbohydrates, which are chemicals made up of carbon, hydrogen, and oxygen.
同质物质是由许多相同的产物或分子组成的物质。
A homomeric substance is one which is made out of any number of identical products or molecules.
但是科学家说，我们的宇宙并不是由星星组成的，而是暗物质构成的。
But scientists say most of the universe is composed not of stars but of dark matter.
物理学家声称，它甚至有望探测到由反物质组成的“反宇宙”。
It may even detect an 'anti-universe' made of antimatter, the physicists say.
物质都是由被称为元素的基本物质所组成。
胎盘和覆盖它的组织（称作绒毛膜）跟你的身体是同一种遗传物质组成的，它们可以提供重要的关于先天缺陷的信息。
The placenta and tissue covering it ( called chorionic villi) are made up of the same genetic material as your baby and can provide important information about birth defects.
美国的粒子物理学家在探索为何现行的宇宙主要由正物质组成的过程中又进了一步。
US particle physicists are inching closer to determining why the Universe exists in its current form, made overwhelmingly of matter.
蛋白质是由特殊的氨基酸组成的物质，它们有助于身体细胞的再生和人体机能的修复。
Proteins are made up of special amino acids, which aid in the overall regenerative and repair functions of the human body.
它们常被误认为是水母，但事实上葡萄牙僧帽水母是有一群工作着的有机物质组成的。
Often mistaken for a jellyfish, the Portuguese man-of-war is actually made up of a colony of organisms working together.
大多数在这里销售的药茶都只不过是很多不知名物质组成的混合物。
Most of the herbal teas sold here are simply flavorful combinations of unspecified composition.
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.
人们认为暗物质是由将近占宇宙四分之一质量的不可见物质组成的。
Dark matter is thought to be an invisible substance that makes up almost a quarter of the mass in the universe.
剩下的96％则由天文学家也不知道的物质组成，它们甚至无法被探测或理解。
The other 96 percent is made of stuff astronomers can't see, detect or even comprehend.
反物质是组成宇宙中的星系、恒星和我们人类原材料(即指物质)的古怪堂兄弟。
Antimatter is a strange cousin to the stuff that makes up galaxies, stars and us.
反物质是组成宇宙中的星系、恒星和我们人类原材料(即指物质)的古怪堂兄弟。
Antimatter is a strange cousin to the stuff that makes up galaxies, stars and us.
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