atom
/ˈætəm; `ætəm/ n
1
(a) [C] smallest part of an element that can exist chemically 原子
Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water. 两个氢原子和一个氧原子结合而形成一个水分子.
(b) [sing] this as a source of energy 原子能
the power of the atom 原子动力
[attrib 作定语]
an atom scientist 原子能专家.
2 [C] very small quantity or thing 极微小的量或事物
The tower was blown to atoms by the force of the explosion. 爆炸的力量把塔炸得粉碎.
There isn't an atom of truth in the rumour. 谣言中没有丝毫的真实性.