那位普通的青年起初只是出于道义跳水救人，而后来则可以说是一种伟大的精神促使他一次又一次地跳下冰冷的河水，直到献出了自己的生命。

That ordinary young man went from the moral need to save the drowning person to what can be called a great spirit that drove him to dive into the cold river time and again till his death.

youdao

那位普通的青年起初只是出于道义跳水救人，而后来则可以说是一种伟大的精神促使他一次又一次地跳下冰冷的河水，直到献出了自己的生命。

That ordinary young man went from the moral need to save the drowning person to what can be called a great spirit that drove him to dive into the cold river time and again till his death.

youdao