Under low background values, the residual rates of volatile phenol and benzo (a) pyrene in A. chinensis are 13.54% and 6.87%, respectively.是什么意思_Under low background values, the residual rates of volatile phenol and benzo (a) pyrene in A. chinensis are 13.54% and 6.87%, respectively.在线翻译_英语_读音_用法_例句