functionally
  (ad.)機能上
  func·tion·al·ly /-ɪ/ 副詞
  functionally
  功能
  Func·tion·al·ly, adv. In a functional manner; as regards normal or appropriate activity.
     The organ is said to be functionally disordered.   --Lawrence.
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  functionally
       adv : with respect to function; "the two units are functionally
             interdependent"