名词
中文翻译：球型物体
同义词：
['sphere', 'sphere', 'sphere']
例句：
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1. The type of ball is determined by the size and weight.
球的类型由大小和重量决定。
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2. The sphere of influence is limited to a certain radius.
影响力范围是有限的，半径内有效。
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3. The sphere of knowledge covers various fields of study.
知识领域涵盖各种学科。