The flick of a finger is enough to make a balloon accelerate away. When moving, it has little momentum and even the friction of the air quickly slows it up.

一根手指的弹击足够使一个气球加速离去，当气球运动时，一点动力，甚至空气的摩擦力可以很快使它慢下来。

youdao

The need for variation means the system cannot see things that are stationary. When the signal is temporarily blocked by a moving object such as a person, however, it shows up loud and clear.

系统不能探测到静止的物品, 而当信号暂时被一个移动的物品(比如一个人)阻挡, 强度变量会响亮而清晰.

youdao

Even when the ocean seems calm, swells are moving water up and down sufficiently to generate electricity.

即使在海洋看起来很平静时，潮汐也会推动海水上下起伏，足以用来发电。

youdao

In time,they said, the moving ocean floor is blocked when it comes up against the edge of a continent.

VOA: special.2010.01.12

When the machine guns opened fire, American soldiers began moving up San Juan Hill.

VOA: special.2010.07.15

The corollary to closing above the 50 day moving average is to watch when the moving average starts trending up.

FORBES: Watching AONE For A Bottom

Prop Rhys Thomas scored a try six minutes before the break, with fly-half Arlidge booting eight points, but Toulouse were always capable of moving up a gear when it mattered.

BBC: Dragons 13-26 Toulouse

Moving up can be hard when there is no corporate ladder.

WSJ: Welcome to the Bossless Company