atomKK [ˋætəm] /ˈætəm/名詞1原子Every atom in this sample has the same number of protons.這個樣本裡的每一個原子都有相同的質子數。2一絲、一點、微量多用於否定句There isn't an atom of truth in what he told the reporters.他對記者說的話沒有一絲是真的。