n.碰撞(撞擊；顛簸；混動空氣)

And walk through this bumpiness road,in the solemn song of sorrow. 在這悲壯歌聲中，走過這崎嶇險阻的道路。

The tiny bumpiness of the wire is enough to make the current flow in little curves, distorting the magnetic field. 導線的微小凸起足以讓電流流經(jīng)微小的曲線，造成磁場扭曲。

Given the bumpiness of the road ahead, you might be better off with a crash helmet. 考慮到你面前這條顛簸的道路，你最好還是配個頭盔吧。

So the bumpiness, the rising high altitude, and the long duration of these two things made this short distance of the road the toughest. 崎嶇不平的道路，逐步升高的海拔，和很長的持續(xù)時間使這段路程成為了最艱難的一段。

On one occasion, I noticed that when I was hymning to the motorcycle, my voice was twisted due to the bumpiness of the road surfaces. 有一次，偶然發(fā)現(xiàn)當我騎車隨意吟唱時，聲音會因為路面的顛簸而被扭曲。