adj.崎岖的;颠簸的;气流不稳的;
例句:
For their feet to create a little bumpy.
为地为自己的双脚创造一点坎坷.
a bumpy road/track
崎岖不平的道路 / 小道
The road is a bumpy, it's a rough ride.
这条路疙里疙瘩的, 真不好走.