1.
Man-made materials have not yet completely replaced natural ones.
人造材料还没有完全取代天然材料。
2.
created from natural materials or by chemical processes.
用天然材料或通过化学过程制造而成。
3.
In today's industry, natural materials difficult to get are often replaced by synthetic materials.
在今天的工业中，难以获得的天然材料常被合成材料所代替。
4.
Side by side with the improvement of natural materials, great achievements have been made in the creation of entirely new materials.
在改进天然材料的同时，研制这种全新材料方面的成绩也十分显著。
5.
Structural Characteristics in Natural Biomaterials and Developing Trend of Bionic Material
天然生物材料结构特征及仿生材料的发展趋势
6.
Wood, coal, oil and gas are different knids of fuel.
木材，煤，油和天然气是不同种类的燃料。
7.
any of various synthetic materials that resemble rubber.
任何一种类似天然橡胶的合成材料。
8.
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。
9.
Research on Water Absorbing Mechanism of Synthetic Polymers and Natural Materials;
合成及天然吸水材料吸水机理的研究
10.
Study on Cassava Starch/NR Composite;
木薯淀粉/天然橡胶复合材料的研究
11.
An Investigation of Bio-Tribological Behavior on Natural Teeth and Prosthetic Materials;
天然牙与牙科修复材料的摩擦学研究
12.
Study on Natural Rubber/Cotton Fiber Composites
天然橡胶/棉浆短纤维复合材料的研究
13.
Researehes and Developments of Polyurethane Based Materials Natural Polymer
天然高分子基聚氨酯材料的研究进展
14.
Research Progress of Short-natural-fiber/Polymer Composites
天然短纤维/聚合物复合材料研究进展
15.
Progresses of Biomaterials Prepared from Natural Biomacromolecules
天然生物医用高分子材料的研究进展
16.
The chemical industry depends very heavily on petroleum, natural gas, and natural gas liquids as sources of raw materials.
化学工业的原料材料来源严重依赖石油、天然气和液态天然气。
17.
Other materials used as fuel include fuel oil, powdered coal, natural gas, and so on.
其他可用作燃料的材料还有柴油、煤粉、天然气等。
18.
Tissue-engineering skin scaffold material based on natural macromolecules
基于天然高分子材料的组织工程化皮肤支架材料