形容词intentional

1. 不规则的：formula 公式 | fortuitous 不规则的 | forward 向前

2. 不规则 不规则的：forttage临拓 | fortuitous不规则 不规则的 | fortuitousdistortion不规则畸变 不规则失真 偶发畸变 意外失真

1. 偶然的;幸运的
    You can describe something as fortuitous if it happens, by chance, to be very successful or pleasant.

    e.g. Their success is the result of a fortuitous combination of circumstances.
           他们的成功是各种环境因素偶然联系在一起的幸运产物。

1. occurring by happy chance

    e.g. profits were enhanced by a fortuitous drop in the cost of raw materials

2. having no cause or apparent cause

    e.g. a causeless miracle
           fortuitous encounters--strange accidents of fortune
           we cannot regard artistic invention as...uncaused and unrelated to the times

    Synonym: causelessuncaused