What's the prototype of a function?
什么是一个函数的原型呢？
This is the creation of a function.
这就是创建函数。
We've added this notion of a function.
我们明白了函数的概念。
Well, you take the gradient of a function.
作出一个函数的梯度。
N_RBRAC - right bracket, end of a function.
N_RBRAC是右括号，即函数的结束部分。
N_LBRAC - left bracket, start of a function.
N_LBRAC是左括号，即函数的开始部分。
My surface is given by the graph of a function.
我们的曲面是由一个函数图像给出的。
You know how to compute a double integral of a function.
要懂得如何计算一个函数的二重积分。
Operation - Name of a function or procedure to process.
operation-要处理的函数或过程的名称。
OK, so that's an example of a contour plot of a function.
这就是一个关于函数等高线图的例子。
The prototype of a function can be defined in header files.
可以在头文件中定义函数原型。
The area R is the double integral over R of a function one.
区域R的面积是函数1在R上的二重积分。
And, it would be going towards higher values of a function.
它应指向函数值较大的一边。
Therefore, it cannot retrieve the return value of a function.
因此，不能获取函数的返回值。
That was our first example of a function of two variables possibly.
这是二元函数中的第一个例子。
So, here I have a contour plot of a function, and I have a blue vector.
我这里有一个函数的等值线图，还有一个蓝色的向量。
The value of the last expression is the default return value of a function.
最后一个表达式的值是默认的返回值。
But they won't be the level curves of a function for which this is the gradient.
但它们不一定是，某个以该向量场为梯度的函数的等值线。
Only the string field is significant; it is the name of a function that is the main program.
只有字符串字段是至关重要的；它表示构成主程序的函数的名称。
An operation is a programmer's tool, offered to them in the familiar guise of a function call.
“操作”是给程序员的工具，它们打扮成程序员熟悉的函数调用。
So, if the gradient of a function is a vector, the divergence of a vector field is a function.
如果说函数的梯度是向量，那么向量场的散度就是函数。
Sometimes poor performance can be a result of a function being used more frequently than expected.
有时候，不必要地频繁调用一个函数会造成性能问题。
Shor's algorithm, for example, is able to find the period of a function of N bits in polynomial time.
例如 Shor的算法能在多项式时间内找到一个N位函数的周期。
One could also foresee custom iterators being created and used entirely within the scope of a function.
人们也可以预先自定义一些迭代器，在函数的整个作用域内创建并使用。
Function annotations associate expressions with parts of a function, such as parameters, at compile time.
函数注释会在编译时将表述与函数的某些部分(比如参数)相关联。
Careful readers of Listing 4 will have noted the use of a function, speakize , which is not detailed here.
细心的读者可能会发现清单4使用了speakize函数，这里我们不打算详细解释。
And then, for each little piece, you take the value of a function, and you multiply by the width of a piece.
对每个小段，用函数的值，与那一小段的长度相乘。
It tells you, if you take the line integral of the gradient of a function, what you get back is the function.
它说，如果你对一个函数的梯度做线积分，就能得到原函数。
These handles' lifetime is determined by a handle scope, which is often created at the beginning of a function call.
这些句柄的生存时间由句柄范围决定，句柄范围经常在一个函数的开始的时候被创建。
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