n.膛線；裝膛線

動(dòng)詞的現(xiàn)在分詞形式.

The safe had been rifled and many documents taken. 保險(xiǎn)箱遭到搜劫，許多文件被盜走了。

He was rifling through her desk in a desperate search for the letter. 他拼命在她的書桌里搜尋那封信。

adj.微不足道的；輕浮的

動(dòng)詞trifle的現(xiàn)在分詞形式.