名词
中文翻译：环形理论
同义词：
['circle theory', 'ring model', 'circle of influence例句：1. The ring theory suggests that the size of a circle is determined by its radius.（环形理论表明，圆的半径决定了其大小。）']
例句：
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1. The ring theory suggests that the size of a circle is determined by its radius.
环形理论表明，圆的半径决定了其大小。
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2. The ring theory has been widely accepted in the field of economics.
环形理论在经济学领域得到了广泛接受。
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3. The ring theory has been applied to many areas such as biology and psychology.
环形理论被应用于生物学和心理学等许多领域。