adj.混雜的；平凡的；不出色的

Sometimes formal English and informal English are undistinguished . 有時(shí)候正式英語(yǔ)與非正式英語(yǔ)很難分清。

He retired from the army with undistinguished record of service. 他帶著平凡的服役記錄離開了軍隊(duì)。

In Harvard he was undistinguished but read widely. 在哈佛大學(xué)讀書期間他并無(wú)過(guò)人之處,但博覽群書。