adj.無記號(hào)的；未被注意的
She handed him an unmarked card. 她遞給他一張無標(biāo)志的卡片。
A few cops prowled in marked and unmarked cars. 幾名警察乘坐有標(biāo)志和無標(biāo)志的汽車在暗中巡查。
his retirement was not allowed to go unmarked. 他的退休是不容忽略的。
