for·tu·itous /fɔrˈtuətəs, ˈtju, fɚ/
 (a.)偶然的


 fortuitous
 不規則


 fortuitous
 偶然 不規則


 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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 fortuitous
      adj 1: having no cause or apparent cause; "a causeless miracle";
             "fortuitous encounters--strange accidents of fortune";
             "we cannot regard artistic invention as...uncaused and
             unrelated to the times" [syn: causeless, uncaused]
      2: occurring by happy chance; "profits were enhanced by a
         fortuitous drop in the cost of raw materials"