bump过去式： bumped；bump过去分词： bumped

bump

v.(无意地)碰，撞;(尤指身体部位)碰上，撞上;颠簸行进

n.碰撞(声);撞击(声);肿块(常因击打所致);

第三人称单数： bumps复数： bumps现在分词： bumping

例句：

The jeep bumped along the dirt track.

吉普车在土路上颠簸着行驶。

He bumped his head on the low beams of the house.

他的头撞到了低矮的房梁上。

The aircraft bumped along erratically without gathering anything like sufficient speed.

飞机忽上忽下，飞行很不平稳，根本未达到应有的速度。