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单个元素的不同形式称为同位素。
Different forms of a single element are called isotopes.
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陆地、水、冰每一种元素的能量以不同形式进行交换。
Land, water and ice, each of factors' energy exchange differently.
youdao
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陆地、水、冰每一种元素的能量以不同形式进行交换。
Land, water and ice, each of factors' energy exchange differently.
youdao