n.膛线；装膛线
动词的现在分词形式.
The safe had been rifled and many documents taken. 保险箱遭到搜劫，许多文件被盗走了。
He was rifling through her desk in a desperate search for the letter. 他拼命在她的书桌里搜寻那封信。
adj.微不足道的；轻浮的
动词trifle的现在分词形式.
