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1·Preparing thin solid film on the metal surface is one of the important methods to improve the metal properties.

在金属表面加工薄膜层是提高材料性能的重要途径之一。

2·There are many factors which affect the wear of metals, such as load, slide velocity, environmental medium and temperature, metal properties and so on.

影响金属材料磨损的因素很多，如载荷、滑动速度、环境介质、温度、材料的性质等。

3·Once the part starts to solidify small dendrites of solid material form in the part. During this time metal properties are being determined, and internal stresses are being generated.

在零件开始凝固其内部形成固态金属的小型树枝状结晶期间金属性能被确定，同时也产生了内应力。

4·It is known that bimetallic and trimetallic catalysts offer improved properties over single metal catalysts.

已知双金属和三金属催化剂提供了优于单金属催化剂的性能。

5·Metal nanoparticles are the subject of intensive research efforts across the world, due to the differences in the optical properties they exhibit compared to bulk metals.

由于金属纳米粒子与整体金属相比所表现出来的光学特性差异，使其成为全世界深入研究的目标。

6·In the isolated state gallium salt and organic compounds are non-conductive but Hla and his colleagues have evidence that these two substances formed by the metal lines are superconducting properties.

在隔离状态下镓盐与有机复合物皆不导电，但Hla和他的同事们有证据表明由这两种物质组成的金属线有超导特性。

7·ALLOY: a substance with metallic properties composed of two or more chemical elements at least one of which is metal.

合金：由一种金属跟另一种或几种金属或非金属所组成的具有金属特性的物质。

8·The microstructure evolution, which is governed by temperature, strain and strain rate during hot metal forming, is a key factor to the mechanical properties.

金属在热成形过程中的微观组织演变是影响产品力学性能的关键因素，该演变过程取决于温度、应变和应变速率。

9·The part of a metal that is not melted during cutting, brazing, or welding, but whose microstructure and physical properties are altered by these processes.

在经过切割、铜焊、焊接后，金属中没有熔融的部分，但其微观结构和物理特性已被改变。

10·Adding a back lining at one side of the porous metal material is an effective and workable way to improve its sound absorption properties.

而在多孔金属材料一侧添加背衬是一种提高吸声性能的有效可行的方法。