热线的英文：
hot line

参考例句：

Missing people help line
走失求救热线

Main Hotlist
主热线列表

Toll Free Sales
免费销售热线

For details, dial hotline
欲知详情，请拨热线

Dial-a-cheat confidential hotline
受理反映欺诈行为的投诉热线

Kim Dae-jung will keep in touch with Defense Minister Kim Dong-shin via hotline during his 3-day stay in Japan
金大中在日本停留三天期间将与国防部长金东信以热线联络。

A viewer or listener's telephone conversation with or telephone call to the host of such a show.
热线听众或观众上述节目中与主人进行电话交谈或打电话的观众或听众

Hot wire machine;strip heater
发热线机

Please ring our 24-hour information line
请拨打我们24小时咨询服务热线。

Dell pioneered the toll-free technical support hotline and made it an industry standard.
戴尔首创技术支持热线，并使之成为业内标准。

hot是什么意思：
adj. 热的；辣的；很受欢迎的；非常棒的；性感的；棘手的

Hot dog; sausage roll; red-hot; red hot
热狗

Hot summer, hot day. Everyone is slow and lazy.
天很热，所有人都慢吞吞的。

The hot iron seared the trousers.
热熨斗烫焦了长裤。

The bath is too hot.
洗澡水太烫了。

Hot weather will sour milk.
天热会使牛奶变酸。

line是什么意思：
n. 线条，界线，路线；条纹；排；铁路线；生产线；台词；态度；防线；前线
v. 用线标出，划线于；使布满纹络；加衬里于；排队，排列成行

This is a lined trunk.
这是一个有衬里的箱子。

They are politically in line.
他们在政治上意见一致。

On a map there are horizontal lines and vertical lines.
在地图上有水平的线和垂直的线。

To inscribe(a line or lines)with a pencil or other marking implement.
画用铅笔或其它做标记的器具刻线

The new proposal is in line with our general line.
新建议和我们总的原则是一致的。