adj.混杂的；平凡的；不出色的
Sometimes formal English and informal English are undistinguished . 有时候正式英语与非正式英语很难分清。
He retired from the army with undistinguished record of service. 他带着平凡的服役记录离开了军队。
In Harvard he was undistinguished but read widely. 在哈佛大学读书期间他并无过人之处,但博览群书。
