基本解释重金属同根派生 Heavymetal相关词英汉例句Keywords Surficial sediment;Surface coating;Non-residual fraction;Selective extraction;Heavymetal;Adsorption; 表层沉积物;生物膜;非残渣态;选择性萃取;重金属;吸附;harmful heavymetal 有害重金属Heavymetal contamination 重金属污染Heavymetal更多例句