With the air bumping out, the cloth coving the background falls suddenly, which will makes great contradiction.

随着气柱的突然上冲，原先覆盖在背景板上的幕布却在瞬间落下，形成巨大反差效应。

youdao

Well to start, you'd better get rid of all the air bumping on the sides of the pencil, since the kinetic energy of a typical oxygen molecule is enough to destabilize the pencil.

一开始你最好排空碰撞着铅笔各面的空气。 因为单是氧原子的动能就足以让铅笔失衡。

youdao

The air in a cloud is always moving around. This causes some of the droplets to bump into others. (1) The bumping droplets join together, forming larger droplets.

云中的空气总是在移动着。这便引起一些水滴相互碰撞。相互碰撞的水滴结合在一起，形成更大的水滴。

youdao

Meteorologists were blaming the nor'easter on the collision of two storm systems: cold air traveling south from Canada bumping into a moist low pressure system heading north from the Carolinas.

WSJ: Major Blizzard Bears Down on Northeast

They enliven their gait by bumping each others' hips rhythmically and leaping into the air as they walk.

UNESCO: Culture