单词 | atom |
释义 | atom UK ['æt.əm] US ['ætˌ-] noun countable ADVANCED ■the smallest unit of any chemical element, consisting of a positive nucleus surrounded by negative electrons. Atoms can combine to form a molecule 原子 •A molecule of carbon dioxide (CO 2)has one carbon atom and two oxygen atoms.二氧化碳(CO2)分子是由一个碳原子和两个氧原子构成的。 •figurative |
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