friction是可数名词吗
friction 是不可数名词 英 [ ˈfrɪkʃ(ə)n ] 美 [ ˈfrɪkʃn ] 不和，分歧常用释义 释义 n. 不和，分歧；摩擦；摩擦力 变形 复数frictions 例句 1. The pistons are graphite-coated to reduce friction. 活塞表面涂有石墨以减少摩擦。 2. Sara sensed that there had been friction between her children. 萨拉感觉到她的孩子们中间出现了摩擦。...