1
call a/the helpline
常用动词为 call，也可用 contact 或 ring。
If you feel anxious, call the helpline.
如果你感到焦虑，请拨打热线服务电话。
热线服务电话；求助热线
先理解核心含义，再看它在真实句子里的用法。
热线服务电话；求助热线
a telephone service that people can call for advice or support
If you feel anxious, call the helpline.
如果你感到焦虑，请拨打热线服务电话。
提供帮助的电话服务(或延伸至电子邮件、短信或网络),可作为公共紧急服务或客户服务。
A telephone service (or (by extension) one using email, SMS, or the Web) which offers help to those who call, as either a public emergency service or customer service.
If you are feeling anxious, you can call the helpline for free.
如果你感到焦虑，可以免费拨打热线服务电话。
The helpline is open from nine in the morning until five in the afternoon.
这条热线服务电话从早上九点开到下午五点。
Many people use the helpline to ask questions about their bills.
许多人用热线服务电话询问账单问题。
常用动词为 call，也可用 contact 或 ring。
If you feel anxious, call the helpline.
如果你感到焦虑，请拨打热线服务电话。
用介词 for 说明服务对象或针对的问题。
There is a helpline for students with exam stress.
有一条为学生提供考试压力帮助的热线服务电话。
helpline 可直接修饰名词，如 helpline number。
Please write down the helpline number for future reference.
请记下热线服务电话号码以备将来参考。
Not this
If you need help, call helpline.
Use this
If you need help, call the helpline.
helpline 是可数名词，通常前面需要限定词（如 the）表示特指；中文没有冠词，容易漏掉。
Not this
You should call to the helpline for advice.
Use this
You should call the helpline for advice.
表示“给……打电话”时，call 是及物动词，直接接宾语，不加介词 to。
Not this
There are many helpline available.
Use this
There are many helplines available.
helpline 是可数名词，many 后接复数名词，因此要用复数形式 helplines。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
拨打求助热线
If you feel anxious, call the helpline for support.
如果你感到焦虑，请拨打求助热线寻求支持。
热线电话号码
Write down the helpline number in case you need it.
把热线电话号码记下来，以防需要。
免费热线
The charity runs a free helpline for people in debt.
该慈善机构为负债人群开通了一条免费热线。
保密热线
You can call the confidential helpline without giving your name.
你可以匿名拨打保密热线。
全国热线
A national helpline was set up to advise students.
为给学生提供咨询，设立了一条全国热线。
热线接线员
The helpline operator listened patiently to my problem.
热线接线员耐心地听我讲了问题。
Use helpline naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 helpline 拆成 help + line：有困难时打的那条求助电话线。
语域：neutral 常见场景：客户服务、电话咨询 该词比较中性，口语和书面语都常用，多用于提供咨询或帮助的热线电话场景。
所列单词均以 -ine 拼写结尾，读作 /aɪn/，与 helpline 的结尾 /laɪn/ 押韵。注意：并非所有以 -ine 结尾的单词都这样读，例如 discipline /ˈdɪsəplɪn/ 和 engine /ˈendʒɪn/ 并不同韵。
Dictionary facts from ECDICT, WIKTIONARY.