hot line 或 hot.line

hot-line的音标和读音：
DJ音标发音： [ˈhɔtˌlain]
KK音标发音： [ˈhɑtˌlaɪn]

hot-line的词性：
n.（名词）

1. A direct and immediate telephone linkup, especially between heads of government, as for use in a crisis.
专线：尤指两政府首脑之间的直接的，随时畅通的电话线，例如在危机中使用的

2. A telephone line that gives quick and direct access to a source of information or help:
电话热线：能快速而直接地得到信息及帮助的电话线：

“This 24-hour hot line has . . . volunteers on duty to talk to callers about personal problems”(New York)
“这条电话热线二十四小时均有…志愿者值班来和拨通者探讨个人问题”(纽约)