im·per·fect /(ˌ)ɪmˈpɚ/
 (a.)有缺點的,半完成的,減弱的,未完成過去時的未完成體


 imperfect
 不完全 不良


 Im·per·fect a.
 1. Not perfect; not complete in all its parts; wanting a part; deective; deficient.
    Something he left imperfect in the state.   --Shak.
    Why, then, your other senses grow imperfect.   --Shak.
 2. Wanting in some elementary organ that is essential to successful or normal activity.
    He . . . stammered like a child, or an amazed, imperfect person.   --Jer. Taylor.
 3. Not fulfilling its design; not realizing an ideal; not conformed to a standard or rule; not satisfying the taste or conscience; esthetically or morally defective.
 Nothing imperfect or deficient left
 Of all that he created.   --Milton.
 Then say not man's imperfect, Heaven in fault;
 Say rather, man's as perfect as he ought.   --Pope.
 Imperfect arch, an arch of less than a semicircle; a skew arch.
 Imperfect cadence Mus., one not ending with the tonic, but with the dominant or some other chord; one not giving complete rest; a half close.
 Imperfect consonances Mus., chords like the third and sixth, whose ratios are less simple than those of the fifth and forth.
 Imperfect flower Bot., a flower wanting either stamens or pistils. --Gray.
 Imperfect interval Mus., one a semitone less than perfect; as, an imperfect fifth.
 Imperfect number Math., a number either greater or less than the sum of its several divisors; in the former case, it is called also a defective number; in the latter, an abundant number.
 Imperfect obligations Law, obligations as of charity or gratitude, which cannot be enforced by law.
 Imperfect power Math., a number which can not be produced by taking any whole number or vulgar fraction, as a factor, the number of times indicated by the power; thus, 9 is a perfect square, but an imperfect cube.
 Imperfect tense Gram., a tense expressing past time and incomplete action.


 Im·per·fect n. Gram. The imperfect tense; or the form of a verb denoting the imperfect tense.


 Im·per·fect, v. t. To make imperfect. [Obs.]

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 imperfect
      adj 1: not perfect; defective or inadequate; "had only an imperfect
             understanding of his responsibilities"; "imperfect
             mortals"; "drainage here is imperfect" [ant: perfect]
      2: having the attributes of man as opposed to e.g. divine
         beings; "I'm only human"; "frail humanity" [syn: fallible,
          frail, weak]
      n : a tense of verbs used in describing action that is on-going
          [syn: progressive, progressive tense, {imperfect
          tense, continuous tense]