ruminate/ˈru:mɪneɪt; `ruməˌnet/ v1 [I, Ipr] ~ (about/on/over sth) think deeply; meditate; ponder 深思; 沉思; 思索 ruminating on recent events 思考最近发生的事.2 [I] (of animals) chew the cud （指动物）反刍.
牛津英汉双解词典