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。
adj
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