1.
slow reacting substance anaphylaxis
过敏反应迟缓反应物质
2.
This reagent attacks feldspars and dark minerals.
这种反应物质侵蚀长石和音色矿物。
3.
To inhibit(a substance or reaction).
抑制（一种物质或反应）
4.
fissionable material production reactor
可裂变物质生产反应堆
5.
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
6.
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
7.
chemical structure,properties(property )and reactions of a particular substance
某物质的化学组成、性质和反应
8.
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
9.
A substance resulting from a chemical reaction.
生成物化学反应生成的物质
10.
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。
11.
And the factors such as ratio of reactants and reaction time influencing on the content of active substance are investigated.
考查了反应物物质的量比及反应时间对活性物含量的影响。
12.
Biochemie( biochemistry): The study of the chemical processes and substances occurring in living things.
生物化学：对生物的化学反应过程和物质的研究。
13.
One that inhibits, as a substance that retards or stops a chemical reaction.
抑制物抑制物，如可减缓或停止化学反应的物质
14.
This substance reacts twice faster than that one .
这种化学物质比那种反应快两倍。
15.
A substance that increases the speed of a reaction.
加速剂，催化剂加快反应速度的物质
16.
a chemical substance formed as a result of a chemical reaction.
化学反应产生的化学物质。
17.
a chemical substance that is present at the start of a chemical reaction.
一开始就参加化学反应的化学物质。
18.
a process in which a substance reacts with oxygen to give heat and light.
物质与氧和反应放出热和光的过程。