My father would burst into the kitchen, brushing past my mother...我父亲会紧贴着母亲擦身而过，冲进厨房。Mother was in the garage, brushing the dirt aside.母亲正在车库里扫除灰尘。A thorough brushing helps to freshen up your mouth...彻底刷牙有助于口气清新。Mouthwas...
The internuclear distances in molecules can be measured in many ways.分子中的核间距,可以用很多方法测定它.The hypothetical electron smeart must exert a net attractive Hellmann - Feynman force to counterbalance the internuclear repulsion.假...