用来做工具的主要材料可以被分为三大类:黑色金属材料,有色金属材料,非金属材料。
The principle materials used for tools can be divided into three major categories: ferrous material, nonferrous material, and nonmetallic material.
准金属,类金属具有一些金属化学特性的非金属元素,例如砷。
A nonmetallic element, such as arsenic, that has some of the chemical properties of a metal.
在金属和非金属这两类物质中,很可能金属总是更为重要的一种。
It is likely that metals will always be the more important of the two groups: metals and nonmetals.
分为软金属,金属化合物,非金属及其他无机物以及有机物质四大类。
Divided into soft metal, metal compounds, non-metallic and other inorganic and organic matter in four categories.
分为软金属,金属化合物,非金属及其他无机物以及有机物质四大类。
Divided into soft metal, metal compounds, non-metallic and other inorganic and organic matter in four categories.
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