1.
Coal is a natural substance, but it is not classed as a mineral.
煤是天然物质，但不列入矿物学。
2.
A substance, especially petroleum, in its unrefined state.
天然物质处于未加工状态的物质，尤指原油
3.
This natural element is often added to drinking water supplies.
这种天然物质经常会添加到饮用水里。
4.
Raw materials are the natural substances from which industrial products are made.
原材料指用以生产工业品的天然物质。
5.
Nylon is a synthetic; it is not from nature.
尼龙是一种合成纤维, 不是天然物质。
6.
Nevertheless, radioactivity remained a property exclusively associated with some thirty substances existing naturally.
然而，放射性一直是大约三十种天然物质特有的性质。
7.
A natural or synthetic substance resembling this material.
角状物天然的或合成的，类似于角质物的物质
8.
cotton made absorbent by removal of the natural wax.
去掉天然蜡后的棉花做成的吸收物质。
9.
Extract the natural antiseptic material in capsicum
辣椒中天然防腐物质的提取方法研究
10.
The Study on Induction, Isolation and Activity Assay of Natural Active Compounds;
天然活性物质的诱导、分离及活性研究
11.
Natural mineral powders that are used as colorants, stable and alkaline and therefore suitable for adding in soaps.
天然矿物质色料，属天然矿物粉末，较稳定而耐硷性的皂用染料。
12.
Natural food, usu free of artificial substances, that is thought to be especially good for the health
保健食品（天然的、通常不加人造物质的食物）
13.
Water soluable, it is a type of plant derived pigment from caramel.
水溶性天然植物染料，是由焦糖提取的物质。
14.
Quality Control of Medicinal Plant Extract;
天然药用植物提取物的生产与质量控制
15.
Prediction of Natural Products Biomembrane Permeability by Fluorescent Liposome;
荧光脂质体技术研究天然产物的生物膜通透性
16.
Influence of Geo-microbes on the Formation of Marine Gas Hydrates
地质微生物对海洋天然气水合物的影响
17.
any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances.
一类来自植物和动物的天然固醇，是蜡质的不溶物质。
18.
A river kind of sediment Certified Reference Material( CRM) based on natural-matrix for environmental radioactivity has been developed.
研制出一种天然基质的河流沉积物环境放射性标准物质。