1.
All changes of matter fall into two broad classes:physical and chemical changes.
物质变化分为两大类：物理变化和化学变化。
2.
The changes in matter which we see all around us are of two types, physical and chemical.
我们周围所看到的物质变化有两种：物理变化和化学变化。
3.
Relationship between Diapause and Changes of Chemical Substances in the Wheat Blossom Midge, Sitodiplosis Mosellana (Diptera: Cecidomyiidae);
麦红吸浆虫滞育与化学物质变化研究
4.
A physical change, as in position, mass, or energy, that an object or a system undergoes.
物质改变物体或系统在诸如位置、面积或能量上所产生的物质变化
5.
Conversion of one substance into another.
变质从一种物质向另一种物质的转化
6.
When matter is changed to a substance different from what it was, the change is a chemical change .
当物质变成与其原来不一样的另一物质时，这种变化是化学变化。
7.
The study on microflora of preserved beef
牛肉变质过程中微生物区系变化研究
8.
animalize food through digestion
通过消化使食物变成动物质
9.
In the case of a physical change no new substance is found.
就物理变化来说，不会发现新物质。
10.
In the case of a physical change no new substance is formed.
就物理变化来说，没有新的物质产生。
11.
In the case of physical change,no new substance is formed.
就物理变化来说，没有新的物质产生 。
12.
Any change that results in forming a new substance is a chemical change.
导致一种新物质生成的任何变化是化学变化。
13.
an apparatus for holding substances that are undergoing a chemical reaction.
盛放化学变化的物质的装置。
14.
A chemical change takes place in any substance when it burns.
物质燃烧时产生化学变化。
15.
make alkaline, as of chemical substances.
使碱化直到变为化学物质。
16.
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。
17.
Discussion on Bond Type Variation Phenomenon and Nature Change in the Compound;
化合物中键型变异现象与其性质变化的探讨
18.
Any change which alters the chemical properties of a substance is a chemical change. For example, the rusting of iron is a chemical reaction.
任何改变物质化学性质的变化都是化学变化。例如，铁钉的生锈就是一种化学变化。