imperfect

imperfect
adjective

not perfect; faulty
不完美的，有缺陷的
an imperfect grasp of English.
对英语掌握不足。
■not fully formed or done; incomplete
不充分的，不完全的
imperfect census records.
不完整的人口普查记录。
smoke due to imperfect combustion.
未充分燃烧引起的烟雾。
(Grammar)(of a tense) denoting a past action in progress but not completed at the time in question
(语法)未完成体的，未完成过去时的
(Music)(of a cadence) ending on the dominant chord
(乐)（终止式）以属音和弦结束
(Law)(of a gift, title, etc.) transferred without all the necessary conditions or requirements being met
(律)（赠予物、头衔等）未满足必要条件即转让的

noun

派生
imperfectly
adverb
语源

Middle English imparfit, imperfet, from Old French imparfait, from Latin imperfectus, from in- 'not' + perfectus (see perfect). The spelling change in the 16th cent. was due to association with the Latin form

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