1.
matter antimatter phase transition
物质 反物质的相变
2.
matter-antimatter cosmology
物质－反物质宇宙论
3.
The antimatter equivalent of helium.
反氦与氦等价的反物质
4.
A hypothetical form of matter that is identical to physical matter except that its atoms are composed of antielectrons, antiprotons, and antineutrons.
反物质一种假想的物质形式，与自然物质相同的，只是其原子由反电子，反质子和反中子构成
5.
A galaxy that is made up of antimatter.
反星系由反物质构成的星系
6.
Antimatter bores holes in matter and causes aging, illness, disease and death.
反物质在物质中钻开缺口，导致老化、疾病和死亡。
7.
Electrons and protons are forms of ordinary matter, but positrons are antimatter particles.
电子和质子构成了普通物质，但正电子是反物质粒子。
8.
slow reacting substance anaphylaxis
过敏反应迟缓反应物质
9.
To inhibit(a substance or reaction).
抑制（一种物质或反应）
10.
fissionable material production reactor
可裂变物质生产反应堆
11.
A substance that retards or arrests a chemical reaction.
反催化剂延缓或阻碍化学反应的物质
12.
A substance participating in a chemical reaction, especially a directly reacting substance present at the initiation of the reaction.
反应体，反应物参加化学反应的物质，特别是指从一开始就参加反应并直接反应的物质
13.
chemical structure,properties(property )and reactions of a particular substance
某物质的化学组成、性质和反应
14.
The composition, structure, properties, and reactions of a substance.
化学性质物质的组成、结构、属性及反应
15.
the image of something as reflected by a mirror (or other reflective material).
某些物体的像在镜子里（或其他反射性物质）反射。
16.
A substance resulting from a chemical reaction.
生成物化学反应生成的物质
17.
This reagent attacks feldspars and dark minerals.
这种反应物质侵蚀长石和音色矿物。
18.
A chemical reaction is a process in which one species is converted to another.
化学反应是一种物质转变成另一种物质的过程。