back-extract
美
英 
英汉解释
例句
A solvent was used as gold extractant and a sort of compound back extract reducer was used for reduction at one step in normal temperature.
用某溶剂作为金萃取剂,用某复合反萃还原剂在常温条件下进行一步还原;
to complete back extract reduction at one step;
反萃还原一步完成;