名词
中文翻译：Unknown
同义词：
['supporting service', 'additional service', 'supplementary aid']
例句：
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1. This hotel provides a supplementary service of free breakfast for guests.
这家酒店为客人提供免费的早餐补充服务。
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2. The company offers a supplementary service of online consultation for customers.
该公司为客户提供在线咨询服务的补充服务。
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3. The school provides a supplementary service of tutoring for students who need extra help.
学校为需要额外帮助的学生提供辅导补充服务。