名词
中文翻译：美德循环
同义词：
['virtuous circle', 'virtuous loop']
例句：
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1.The cycle of life is a beautiful example of how nature works.
生命的循环是大自然运作的美妙例证。
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2. The cycle of growth and decay is a natural part of the ecosystem.
生长和衰败的循环是生态系统的自然部分。
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3. The virtuous cycle of education leads to personal development and social progress.
教育的良好循环有助于个人发展和社会发展。