erst
英 [ɜ:st] 美 [ɜst]

adv.

以前，往昔的；

英英释义

erst[ 'ə:st ]

• adv.at a previous time

  "her erstwhile writing"

  同义词：onceformerlyat one timeerstwhile

权威例句

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Small ncRNA transcriptome analysis from Aspergillus fumigatus suggests a novel mechanism for regulation of protein synthesis.