短語詞組短語chemical l bond 化學(xué)鍵chemical l bond energy 化學(xué)鍵能量chemical -bond energy 化學(xué)鍵能量energy chemical -bond 化學(xué)鍵能definition of chemical bond 化學(xué)鍵的定義Nonpolar chemical bond 非極性鍵chemical bond structure 化學(xué)鍵結(jié)構(gòu) 返回 chemical bond