名词
中文翻译：球状物
同义词：
['ball', 'ballistics']
例句：
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1. Theball was in the center of the net.
球在网中央。
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2. Balling is asport that involves throwing a ball into ahoop.
抛投是一项涉及将球投入篮筐的运动。
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3. The balling machineis used to make balls for children's toys.
球机用于制作儿童玩具的球。