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| 1. | The common nonmetals tend to be less ductile, have no electrical conductivity, and have poor heat conductivity |
| 普通非金属趋向于少延展性、无导电性，而且传热性能不好。 |
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| 2. | Alpha Brasses contain less than 40% zinc; Beta Brasses (40-45% zinc) are less ductile than alpha Brasses |
| α黄铜的含锌量低于40%,β黄铜含锌较多(40～45%)可锻性较α黄铜差,但强度大。 |
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