erst

1. Tracking algorithm for maneuvering target with dual-wave band ERST
   双波段红外警戒机动目标的跟踪算法
2. That erst thy false affection gave.
   那是你过去馈赠的虚情。
3. Poison can breath, that erst perfumed;
   馨香的气息也可能是毒品；
4. Today is already the society of informatization, people was lost to the explosion of information erst amazed.
   今天是已经信息化的社会，人们对信息的爆炸失去了往昔的惊异。
5. Jerchavin was the really Erst Russian poet, whose poems transcend previous Russian classicism and reject the reality of life.
   杰尔查文是俄国第一个真正的诗人，其诗歌超越了此前俄国古典主义的对现实生活所取的排斥态度。

adv

1. at a previous time
   1. at one time he loved her
   2. her erstwhile writing
   3. she was a dancer once

   Synonym:    onceformerlyat one timeerstwhile