reduce,decline,decrease的区别

decrease,lower,reduce的区别 怎样区分reduce,decrease,diminish,decline?主要是用法. reduce decrease reduce 与 decrease 有何区别? reduce by 和reduce on的区别 on the decline和in decline的区别 reject decline 和 refuse 的区别 是reduce the price还是decrease the price呢? 辨析 A) decrease B) reduce C) condense D) contract decrease的用法, decrease of 的意思? decline,refuse,object,reject的区别 具体一点