热线系统
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Subway Operation Service Hotline System 地铁运营服务热线系统
hotline system
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is the first part of the national hotline system to help to protect teens' rights.
这是国家帮助保护青少年权益的热线系统中第一部分。
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The City had its 911 system for emergencies and also a 311 hotline for reporting non-emergencies, like streets needing to be repaired, lost dogs or minor complaints.
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