热线求助电话的英文：
telephone helpline

telephone是什么意思：
n. 电话
v. 打电话，通电话

Receptionists'telephones are always engaged.
接待员的电话总是占线。

I have to make a telephone call.
我必须打个电话。

I telephoned to thank her.
我打电话向她道谢。

It happened that there was a telephone booth nearly.
碰巧在附近有个公用电话亭。

It happened that there was a telephone Booth nearBy.
碰巧在附近有个公用电话亭。

helpline是什么意思：
n. 热线服务电话

Fiona and Alastair have become patrons of the National Missing Person's Helpline.
菲奥娜和阿拉斯泰尔已经成为国家失踪人口服务热线的代言人。