| 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 He hasn't an atom of sense (= He has no sense) , that boy.那个孩子啊，一点头脑也没有。 |