substitute: n.1.代替者[物],代用品;候补员;后补选手;收入(数)。2.【语法】代用词[语]。3.【矿物】转接器,短节。短语和例子There's no substitute for parents. 父母亲是没有别人可以代替的。vt.以…代替,用…代替(for);【化学】取代。 substitute A for B. 用A代B。 substitute margarine for b
When the substituting ratio of urea reach up to 17 % , the costs of jd can be obviously decreased , but the water - reducing ratio of jd did n ' t come down 在加入17尿素的情况下,改性密胺树脂高效减水剂jd的减小率没有降低,成本却大幅度下降。