我需要再次构建，但这次是在一台拥有主线代码的集成机器上进行。
At this point we build again, but this time on an integration machine based on the mainline code.
它只不过就是调用函数或者子例程的主线代码的概念，其中每个函数或者子例程实现了更大的程序的一个单独的部分。
It? S simply the concept of mainline code that calls out to functions or subroutines that each implement an individual piece of a larger program.
这阻塞了主线程但是在另一个线程上执行代码。
This blocks the main thread but executes the code on another thread.
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