名词
中文翻译：封闭网络
同义词：
['closed system', 'isolated network']
例句：
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1.The closed network is essential for the operation of our computer system.
这个封闭的网络对于我们计算机系统的操作至关重要。
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2. The closed network has limited access to information and resources.
这个封闭的网络对于信息的获取和资源的使用有着限制。
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3.The closed network is a security measure that prevents unauthorized access.
这个封闭的网络是一种安全措施，用来防止未经授权的访问。