名词
中文翻译：封闭模型
同义词：
['closed system', 'closed loop', 'closed-loop control']
例句：
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1. Inthe closed model, all data is processed internally without any external interference.
在封闭模型中，所有数据都在内部处理，不受外部干扰。
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2. The closed model has proven to be effective in reducing energy consumption.
封闭模型已被证明能有效降低能源消耗。
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3.The closed model is a useful tool for predicting future trends in the market.
封闭模型是预测市场未来趋势的一种有用工具。