短語詞組短語stretching g vibration 伸展振動symmetrical stretching vibration 對稱伸縮振動carbonyl stretching vibration band 羰基伸縮振動峰antisymmetry stretching vibration 反對稱伸縮振動Symmetric Stretching Vibration 對稱伸縮振動symmetrically stretching vibration 對稱伸縮振動stretching vibration band 伸縮振動峰carbonyl stretching vibration 羰基吸收峰antisymmetric stretching vibration 反對稱伸縮振動 返回 stretching vibration