轻率的（形容词）

(adjective) Cheerful and lacking any serious concerns or worries, regardless of unknown, possibly harmful consequences.

EXAMPLE: The blithe young friends sailed their small boat out of the harbor without consulting weather reports that warned of an approaching storm.

这位轻率的年轻朋友没有参看天气预报的暴风警告就把他的小船驶出了港口。