In addition, the present status of implementation of the new chemical substance notification and its effects on chemical environmental management in China is given briefly.
文中还介绍了我国新化学物质申报审批制度的实施现状及其对化学品环境管理的影响。
We can get a new substance if we incorporate a chemical substance with others.
如果我们把一种化学物质和其他化学物质混合就能得到一种新物质。
A chemical change is one in which the structure of particles is changed and a new substance is formed.
化学变化是一种改变粒子结构、形成新物质的一种变化。
The new substance is a liquid that quickly changes to a solid when mixed with another chemical.
这种新液体物质如果和另外一种化学制品混合在一起，就会很快变成固体。
After a potential new drug substance is discovered and undergoes definitive chemical and physical characterization, a great deal of biological information must be gathered.
当一种潜在的新药被发现并经历了明确的化学上及物理学上的鉴定之后，还有很多生物学的信息需要收集。
A chemical change is one in which the structure of particles is changed and a new substance is formed.
化学变化是改变分子结构、化学变化是改变分子结构、形成新物质的一种变化。
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。
A chemical change is one in which the structure of particle is changed and a new substance is formed.
化学变化是改变粒子结构、形成新物质的一种变化。
Whenever a chemical change takes place , There is a new substance formed .
每当发生化学变化时，就有一种新的物质生成。
We may define chemistry as the science in which we deal with the chemical change in matter as a result of which it is possible to form a new substance.
作为一门科学来给化学下定义就是，物质发生了化学变化，这种变化的结果就是不是有可能产生了新的物资。
Objective To prepare a new multi functional sampler, which can better reflect the level of dust and chemical substance inhaled by exposed human bodies.
目的研制一种多用途，更能反映人体实际接触或吸入尘毒水平的采样仪。
Objective To prepare a new multi functional sampler, which can better reflect the level of dust and chemical substance inhaled by exposed human bodies.
目的研制一种多用途，更能反映人体实际接触或吸入尘毒水平的采样仪。
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