a phone or online service that provides advice and information about particular problems 服务热线（提供咨询和信息的电话） to set up/run a helpline 设置/运行热线服务 an AIDS helpline 艾滋病求助热线 Our online helpline service is a chat service for people with questions about mental health issues. 我们的在线求助热线服务是针对有心理健康问题的人的聊天服务。
Oxford Collocations DictionaryHelpline is used after these nouns:- telephone