The sediment content of P4-8CDD/Fs was 11.6~ 369pg/g dw, dominated by P4-8CDFs, and that of 2,3,7,8-substituted PCDD/Fs was 4.1~232.4pg/g dw.是什么意思_The sediment content of P4-8CDD/Fs was 11.6~ 369pg/g dw, dominated by P4-8CDFs, and that of 2,3,7,8-substituted PCDD/Fs was 4.1~232.4pg/g dw.在线翻译_英语_读音_用法_例句