Cadmium is a metallic element.

镉是一种金属元素。

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Nickel is a metallic element.

镍是一种金属元素。

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It is a metallic element that is found in the crust of Earth.

这是一种金属元素，存在于地球的地壳。

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It is a metallic element that is found in the crust of Earth.

这是一种金属元素，存在于地球的地壳。

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