在动物研究中，癌仅与持续或反复暴露于金属致癌物有关联。

In animal studies cancer has only been associated with metal carcinogens involving continual or repeated exposure.

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企业致力于金属复合材料新产品的研究、开发、及规模化生产。

Metal composite materials business is committed to new product research, development, and large-scale production.

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高力公司成立于1970年，致力于金属热处理和金属产品的制造。

Founded in 1970, Kaori specializes in metal heat treatment processing and the manufacture of metal products.

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So, if we want to go from that stable state to that less stable state, we need to put in a certain amount of energy to our system, that difference between the free electron and the electron bound to the metal.

所以，如果我们想使电子,从稳态到达不够稳定的状态，我们需要引入一定数量的,能量到系统中，即自由电子和束缚于金属的,电子的能量差。

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