build-up
 (a.)內建的


 build-up
 建立


 buildup
      n 1: the act of building up an accumulation; "I envied his rapid
           buildup of assets"; "a military buildup in preparation
           for the invasion"
      2: the result of the process of accumulation; "the buildup of
         leaves blocked the drain pipes"
      3: highly favorable publicity and praise; "his letter of
         recommendation gave her a terrific buildup"