temporizer
  姑息者,順應時勢者,騎牆主義者
  Tem·po·ri·zer n. One who temporizes; one who yields to the time, or complies with the prevailing opinions, fashions, or occasions; a trimmer.
     A sort of temporizers, ready to embrace and maintain all that is, or shall be, proposed, in hope of preferment.   --Burton.
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  temporizer
       n : someone who temporizes; someone who tries to gain time or
           who waits for a favorable time [syn: temporiser]