intrepid
这位无畏的探险家独自穿越了危险的丛林。
The ___intrepid explorer journeyed alone through the dangerous jungle.
这位无畏的救援人员毫不犹豫地爬进了倒塌的建筑中。
The ___intrepid rescue worker climbed into the collapsed building without hesitation.
一位勇敢的年轻发明家向满屋子持怀疑态度的人展示了她颠覆性的原型机。
An ___intrepid young inventor presented her radical prototype to a skeptical audience.