atom [ˈætəm]
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基本释义
n.原子;微粒,微量
英英释义
the smallest unit of any chemical element , consisting of a positive nucleus surrounded by negative electrons . Atoms can combine to form a molecule
参考例句
For many years the atom was believed to be indivisible. 在过去有很多年原子一直被认为是不可分割的。
He could not get up an atom of sympathy for her. 他对她激不出一点同情心。
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