spur

Mother's encouragement is the spur that he studies harder.

母亲的鼓励鞭策着他奋发努力。

Competition can be a spur to creativity.

竞争可以激发创造力。

Fear of failure was the spur for his success.

对失败的恐惧是他成功的动力。

The reward was a spur to greater effort.

奖励是更大努力的刺激因素。

Poverty acted as a spur to his ambition.

贫穷激发了他的雄心壮志。