他一时冲动买了这张昂贵的演唱会门票。

He bought this expensive concert ticket on ___impulse.

运动员在起跑时感受到一股强烈的神经冲动。

The athlete felt a strong ___impulse in his nerves at the starting line.

她买下那条裙子的冲动源于对时尚的热爱。

The ___impulse to buy that dress came from her love for fashion.