两个里程碑的回眸与启迪——纪念道尔顿创立原子论二百周年与卢瑟福提出元素蜕变理论一百周年兩箇裏程碑的迴眸與啟迪——紀唸道爾頓創立原子論二百週年與盧瑟福提齣元素蛻變理論一百週年 량개리정비적회모여계적——기념도이돈창립원자론이백주년여로슬복제출원소세변이론일백주년 A Backward Glance over the Two Milestones——Commemorating the Second Centennial Anniversary of Dalton’s Atomism and the Centennial Anniversary of Rutherford’s Radioactive Decay Theory