名词
中文翻译：安全线
同义词：
['safety line', 'safety net']
例句：
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1.The company has implemented a secure line of communication to ensure confidentiality.
该公司已实施一条安全通信线路，以确保机密性。
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2. The construction workers were using a secure line to connect the two towers.
建筑工人正在使用一条安全线将两座塔楼连接起来。
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3.The government has established a secure line of communication with the opposition party.
政府已经与反对派建立了一条安全沟通渠道。