形容词inadequatedeficientfaultyincompletedefective

形容词perfect

1. 不完美的;有缺点的;有瑕疵的
    Something that is imperfect has faults and is not exactly as you would like it to be.

    e.g. We live in an imperfect world...
           我们生活在一个并不完美的世界上。
    e.g. They have a huge selection of perfect, slightly imperfect and discontinued cookers, fridges and so on.
           他们有大量完好的、略有瑕疵的以及已停产的炊具、冰箱和其他货品可供选择。

2. (动词的)未完成过去式，未完成过去时
    In grammar, the imperfect or the imperfect tense of a verb is used to describe continuous situations or repeated actions in the past. Examples are ''I was reading'' and ''they were eating''.

公共查询·英语单词大全

1. a tense of verbs used in describing action that is on-going

    Synonym: progressiveprogressive tenseimperfect tensecontinuous tense

1. wanting in moral strength, courage, or will
    having the attributes of man as opposed to e.g. divine beings

    e.g. I''m only a fallible human
           frail humanity

    Synonym: falliblefrailweak

2. not perfect
    defective or inadequate

    e.g. had only an imperfect understanding of his responsibilities
           imperfect mortals
           drainage here is imperfect