名词
中文翻译：封闭系统同义词
同义词：
['closed loop', 'closed circuit', 'closed loop system']
例句：
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1. The closed system is designed to prevent leaks and ensure safety.
这个封闭系统旨在防止泄漏并确保安全。
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2. The closed system is essential for maintaining the stability of the ecosystem.
这个封闭系统对于维持生态系统的稳定性至关重要。
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3. The closed system was designed to be energy-efficient and environmentally friendly.
这个封闭系统旨在实现能源高效和环境友好。