免费通话的英文：
no charge call

参考例句：

Ring the operator and ask for freefone 8921
接通接线生,然後要免费通话8921号

charge是什么意思：
n. 费用；电荷；掌管；控告；命令，指示；指责
v. （使）充电；使承担；指责；装载；索价；向前冲；控告；把...记入帐册

charge the enemy
向敌人冲去

mileage charges
按英里程计算的运费

What is this charge for?
这项费用是什么？

Is there an extra charge?
有额外的费用吗？

The nucleus is formed of neutrons with no charge and protons with a positive charge
核子是由不带电荷的中子和带正电荷的质子形成的。

call是什么意思：
v. 把...叫做；认为...是；打电话叫；大声呼叫；召唤；打电话；访问
n. 打电话；通话；短暂拜访；请求；呼吁；召唤；呼唤

call upon; call on
应用;访问;号召;呼吁

This is called wow.
这叫作“音幅失真”。

It was called the Restoration.
这就是所谓的王政复辟。

A call to WSALookupServiceEnd was made while this call was still processing. The call has been canceled.
在该调用还处于处理中时，就调用了WSALookupServiceEnd。该调用被取消。

Friends are lost by calling often and calling seldom
交往过密过疏,都会失去朋友