呼叫功能的英文：
n. calling function

参考例句：

There is the redirection function in your telephone.
你的电话里有转移呼叫的功能。

calling是什么意思：
n. 职业；欲望；召集；邀请
v. call的现在分词

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

function是什么意思：
n. 官能，机能；功能；职责，职务；函数
v. 工作；活动；运转，运作；起作用

function requester
功能请求者

norm functional
范数泛函

The divergence of a vector function is the scalar function
矢量函数的散度是一个标量函数。

A functional is a kind of function where the dependent variable is itself a function.
泛函就是自变量本身为函数的一数函数。

The frequency response function includes an aerodynamic transfer function
频率的主函数包括主动力传递函数。