讨论了多相物质粉末衍射的物相检索问题，介绍了XRDS的物相检索软件。
The problems of phase identifying for powder diffraction of multiphase material have been discussed, and the software XRDS for phase identifying have been introduced.
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.
有一个巧妙的方法来纯化dna，用一种酶能够辨别和摧毁微生物有机体的遗传物质而不会销毁太多相关的DNA。
Purifying it involved a clever trick using enzymes that can identify and destroy the genetic material of micro-organisms without also destroying too much of the DNA of interest.
他们中的许多相信随着时间的流逝，物质逐渐冷却，更多种类的原子开始形成，然后这些原子最终凝聚成了现在宇宙中的恒星和星系。
Many believe that as time passed and matter cooled, more diverse kinds of atoms began to form, and they eventually condensed into the stars and galaxies of our present universe.
但是这种中药混合物含有许多化学物质，它们之间以及与人体之间有许多相互作用。
But these mixtures contain many chemicals that govern a myriad of interactions with each other and the body.
大气中蒸汽物质的成核反应可以以均相和多相方式发生。
Nucleation of vapor substances in the atmosphere can occur both homogeneously and heterogeneously.
纳米级多相材料以显示某些物质界面的某种特殊的物理性质和化学性质见长。
Heterogeneous nanometer level material is expert in kind of peculiar physical property and chemical property demonstrating some matter interface certain.
在炼丹的过程中，炼丹术士们围绕着丹砂以及与丹砂有关的物质进行了各种可能性的探索和实验，并了解到了许多相关的化学知识。
During the process of refining pills, some alchemists had understood chemical knowledge by various kinds of possible experiments and exploration on cinnabar and related materials.
化学中的聚合物就是物质中很多相同的分子重复层叠排列，以不同的排列方式组成各种物理和化学形态。
Polymer chemistry links together many repeating chains of small molecules to form a layer-like structure that has unique physical and chemical properties.
化学中的聚合物就是物质中很多相同的分子重复层叠排列，以不同的排列方式组成各种物理和化学形态。
Polymer chemistry links together many repeating chains of small molecules to form a layer-like structure that has unique physical and chemical properties.
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