fortuitously
  (ad.)偶然地;意外地
  For·tu·i·tous a.
  1. Happening by chance; coming or occuring unexpectedly, or without any known cause; chance; as, the fortuitous concourse of atoms.
     It was from causes seemingly fortuitous . . . that all the mighty effects of the Reformation flowed.   --Robertson.
     So as to throw a glancing and fortuitous light upon the whole.   --Hazlitt.
  2. LAw Happening independently of human will or means of foresight; resulting from unavoidable physical causes.
  Syn: -- Accidental; casual; contingent; incidental. See Accidental.
  -- For*tu*i*tous*ly, adv. -- For*tu*i*tous*ness, n.
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  fortuitously
       adv : by good fortune; "fortunately the weather was good" [syn: fortunately,
              luckily, as luck would have it] [ant: unfortunately,
              unfortunately]