not but
  雖然,但並非不…
  Not, adv.  A word used to express negation, prohibition, denial, or refusal.
     Not one word spake he more than was need.   --Chaucer.
     Thou shalt not steal.   --Ex. xx. 15.
     Thine eyes are upon me, and I am not.   --Job vii. 8.
     The question is, may I do it, or may I not do it?   --Bp. Sanderson.
  Not . . . but, or Not but, only. [Obs. or Colloq.]
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