ne·ces·si·tate /nɪˈsɛsəˌtet/
 (vt.)迫使,使成為必需,需要


 Ne·ces·si·tate v. t. [imp. & p. p. Necessitated p. pr. & vb. n. Necessitating ]
 1. To make necessary or indispensable; to render unavoidable.
    Sickness [might] necessitate his removal from the court.   --South.
    This fact necessitates a second line.   --J. Peile.
 2. To reduce to the necessity of; to force; to compel.
    The Marquis of Newcastle, being pressed on both sides, was necessitated to draw all his army into York.   --Clarendon.

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 necessitate
      v 1: require as useful, just, or proper; "It takes nerve to do
           what she did"; "success usually requires hard work";
           "This job asks a lot of patience and skill"; "This
           position demands a lot of personal sacrifice"; "This
           dinner calls for a spectacular dessert"; "This
           intervention does not postulates a patient's consent"
           [syn: ask, postulate, need, require, take, involve,
            call for, demand] [ant: obviate]
      2: cause to be a concomitant