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chemical elements
life.sc. 化学元素
chemical element elements and their compounds ; A substance made up of atoms with the same atomic number; common examples are hydrogen, gold, and iron
environ. 化学元素 (只有一种原子组成的物质。常见的例子是氢、金和铁。)
chemical element
phys. 化学元素
chemical elements: 14 phrases in 5 subjects
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