小提琴手以惊人的技巧演奏了这首协奏曲，展现了非凡的炫技才华。

The violinist performed the concerto with astonishing ___bravura, displaying extraordinary technical brilliance.

他的勇敢行为——独自攀登那座险峰——赢得了所有人的钦佩。

His ___bravura act of climbing the dangerous peak alone earned everyone's admiration.