1.
The amount of a specified substance in a unit amount of another substance.
浓度在某一单位物质中另一特定物质的含量
2.
(physics) a coefficient that expresses how much of a specified property is possessed by a specified substance.
（物理）表示特定物质具有某种特性的多少的系数。
3.
The Management System for the Specific Substances of Electrical and Electronic Equipment in Japan;
日本电气电子产品中特定物质的管理制度
4.
It can give information about the identity or quantity of a substance.
它可以确定某一物质的特性和数量。
5.
Something, such as a general quality or attribute, that can be predicated.
可以被断定的事物，如，共同属性或特质
6.
Matter has certain features or properties that enable us to recognize it easily.
物质具有一定的特征或特性，因此极易识别。
7.
Something, such as a quality or characteristic, that is related to a particular possessor; an attribute.
归属物与特定的拥有者有关的事物，如某种性质或特征；特性
8.
The study of minerals, including their distribution, identification, and properties.
矿物学对矿物质的研究，包括其分布、鉴定及特征
9.
The essence can also be said to be the defining properties of a thing or a kind.
本质是一个事物或一类事物的限定特性。
10.
A substance necessary for or taking part in a particular metabolic process.
代谢物在某种特定的代谢过程中所必需的物质
11.
having desirable or positive qualities especially those suitable for a thing specified.
具有所期望的或者积极的品质，特别是适合特定事物的品质。
12.
We usually use some properties reflected by external characteristics of minerals for mineral identification.
通常是采用矿物外部特征所反映的一些物理性质来鉴定矿物。
13.
Physical properties depend on the nature and arrangement of the soil particles.
土壤的物理特性决定于土粒的性质和排列。
14.
Montreal Protocol on Substances that Deplete the Ozone Layer
关于消耗臭氧层物质的蒙特利尔议定书
15.
determine the nature of.
由事物的本质特征所决定的一个逻辑思维过程。
16.
A substance, such as a medicine, prepared for a particular purpose.
配制品为特定目的作准备的物质，如药品
17.
Determination of Clenbuterol in Animal Feed by GC/MS;
动物饲料中克伦特罗的气质色谱法测定研究
18.
Determination of Fenofibrate Soft Capsules by HPLC Method
HPLC法测定非诺贝特软胶囊的有关物质及含量