以我的经验来看，导致程序运行速度慢得罪魁祸首可能就是某个内部或嵌套循环，也可能是对第三方库函数的调用。
In my experience, it will usually be a particular inner or nested loop, or a call to some third party library methods, which is the main culprit for running the program slow.
对标准程序库而言，有很多程序库函数在固定的对象中返回值，总是重复使用同一对象，这就使得那些函数不可重入。
As with the standard library, there can be many library functions that return values in fixed objects, always reusing the same objects, which causes the functions to be non-reentrant.
当开发一个应用程序或者是其他的处于用户空间的程序时，开发者必须考虑其他人写的代码----操作系统，库函数，还有其他程序，等等。
When developing an application or other userspace program, the developer has to take into consideration the code written by others: the operating system, the libraries, other programs, etc.
使用嵌入式SQL可以让对数据库的访问比直接使用库函数来访问数据库更加自然、直观，而且程序员可以更少犯错误。
Using the Embedded SQL though, makes the database access much more natural, intuitive, and error-free for the programmer than through the direct use of libraries.
对于任何给定程序库，您都应该通读它所提供的文档，以了解其原型和标准库函数的用法是否有所变化。
You'll need to go through the documentation provided with any given library to know if there is any change in the prototypes and therefore in the usage of the standard library functions.
随linux一起交付的还有几千条命令和应用程序，它们至少都需要libc库函数。
Linux ships with thousands of commands and applications that all require at least the libc library functions.
调用应用程序提供的算法：C运行时库函数qsort 排序对象数组，但你必须提供比较函数。
To Invoke an Application-Supplied Algorithm The C runtime library function qsort sorts an array of objects, but you must supply the function that compares objects.
将含有库函数名的汇编代码程序翻译成中间语言程序，然后再转换成高级语言程序可降低逆编译的复杂性。
Assembler code program containing library function name is firstly translated into intermediate language program and then into high level language program to reduce complexity of decompilation.
如今我们需要意识到，任何程序均可调用标准库函数，查找主机名对应的IP地址。
For now we must be aware that any application can call a standard library function to look up the IP address (or addresses) corresponding to a given hostname.
操作系统通过定义系统调用函数以及相应的接口，实现系统对硬件函数调用的支持，使程序设计者能够像调用普通库函数一样调用硬件函数。
The operating system defines necessary system calls and interfaces to support the calling of hardware functions which follows the same semantic as calling software functions.
为了使该程序在电脑中运行时节省内存，在入库函数中使用了链表功能。
In order to run the program to save computer memory, used in the function list storage function.
为了使该程序在电脑中运行时节省内存，在入库函数中使用了链表功能。
In order to run the program to save computer memory, used in the function list storage function.
应用推荐