She threw the ball up and caught it again.

她把球抛起来又接住。

If you roll a ball up a slop, it will roll down again.

如果你把球滚上斜坡，它还会滚下来。

Move the red ball up and down.

把这个红球举高再放下。

You can't pick the ball up in football.

踢足球时不许可用手持球。

He teed the ball up carefully and then teed off.

他把球小心地放在球座上，然后开球。