ball up 使混乱 ; 搞成一团糟
Bouncing Ball Up 弹跳球
ball on up-slope 斜上坡球
Keep The Ball Up 让球飞起来
hold up ball 控制球
take up the ball 接着讲 ; 接着讲话
She threw the ball up and caught it again.
她把球抛起来又接住。
You turn toward a ball on the floor, and your brain sends a command to pick it up.
你转过来看到地板上的一颗球，你的大脑会发出一个命令，让你把它捡起来。
A mass equal to many stars might end up in a ball no larger than a city.
一个相当于许多个星星加起来那么大的家伙，最终可能缩小成不比一个城市更大的球体。
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