The second type of element is noted by its lack of metallic properties. These are the nonmetals.

第二种元素由于缺乏金属的性质而被关注，即非金属。

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Symptoms include weakness, lack of energy, poor appetite, weight loss, metallic or ammonia taste in the mouth, skin color changes, and worsening memory.

虚弱，乏力，食欲不振，体重减轻，口中有金属或氨味，皮肤变色，记忆减退。

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