ten·ta·tive /ˈtɛntətɪv/
  試驗,假設(a.)試驗性質的,暫時的
  tentative
  試驗的
  tentative
  試探
  Ten·ta·tive, n.  An essay; a trial; an experiment.
  ◄ ►
  Ten·ta·tive a.  Of or pertaining to a trial or trials; essaying; experimental. “A slow, tentative manner.” --Carlyle. -- Ten*ta*tive*ly, adv.
  tentative
       adj 1: under terms not final or fully worked out or agreed upon;
              "probationary employees"; "a provisional government";
              "just a tentative schedule" [syn: probationary, provisional,
               provisionary]
       2: unsettled in mind or opinion; "drew a few tentative
          conclusions" [syn: doubtful]