名词
中文翻译：球状物体
同义词：
['sphere', 'sphere', 'spherical']
例句：
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1. The ball was in the air when it hit the ground.
球在空中时被击打在地上。
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2. The sphere of influence is about 50 miles wide.
影响范围大约是50英里宽。
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3. The sphere of influence is a circle with a radius of 50 miles.
影响范围是一个半径为50英里的圆。