1.Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.兩個(gè)氫原子和一個(gè)氧原子結(jié)合組成一個(gè)水分子。

2.Atoms of iron in the nail combine with atoms of oxygen from the air to form molecules of iron oxide, or rust.釘子里的鐵原子與空氣中的氧原子結(jié)合后形成氧化鐵分子，也就是銹。

3.You should try to combine exercise with a healthy diet.你應(yīng)該把鍛煉和健康飲食結(jié)合起來(lái)。