该查询首先经过编译,然后在那个数据源上开始执行。
The query is compiled and execution of the query at the data source starts.
PHP代码不经过编译,而是在运行时加以解释。
PHP code isn't compiled; rather, it's interpreted at run time.
在这样的系统中,链接到经过编译的代码而是实际的源代码会好得多。
In such a system, it is much better to link against the compiled code instead of the actual source code.
In a compiled language, you have an intermediate step, in which you take the source code, it runs through what's called a checker or a compiler or both, and it creates what's called object code.
而在编译语言里,你就会经过一个中间的步骤,在这种语言里输入源码后,先经过过滤器,或者编译器检查后,它会创建一个叫做目标代码的东西。
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