Adjective:

1. not having an identifying mark;

   "unmarked cards"
   "an unmarked police car"
   

2. not taken into account;

   "his retirement was not allowed to go unmarked"
   

spotlessadj.洁白无瑕的；非常洁净的；无缺点的；无污点的；无可挑剔的

unblemishedadj.清白的；无疵的

pristineadj.原始的；未受损的；清新的；纯朴的

immaculateadj.洁白的；无瑕疵的；无过失的

perfectadj.完美的；完全的；完满的；十足的；理想的vt.使完美；使完全

without a scratch丝毫未受伤

intactadj.完好无缺的；原封不动的；未经触碰的

undamagedadj.未受损伤的；没有破损的

overlookedv.俯瞰；远眺；没注意到；忽视n.忽视；远眺

unnotedadj.不引人注意的；不足道的；无价值的

markedadj.有记号的；显著的；受监视的v.弄污；打分；留意；做标记（动词mark的过去式和过去分词）

1. She handed him an unmarked card.
   她递给他一张无标志的卡片。
2. A few cops prowled in marked and unmarked cars.
   几名警察乘坐有标志和无标志的汽车在暗中巡查。
3. his retirement was not allowed to go unmarked.
   他的退休是不容忽略的。