说明：  CCR，并发与协调运行时(Concurrency and Coordination Runtime)。从名字里我们就可以知道，这个东东是用来简化并发程序设计的。为何要并发呢？因为我们有多个任务需要处理，如果能同时做就会充分利用硬 件而减少处理的时间。自然的，CCR也是以“任务”为核心进行设计的，CCR中的代码也可以分为如下几个功能：描述任务、生成任务、调度任务和执行任务。
(CCR, Concurrency and Coordination Runtime (Concurrency and Coordination Runtime). From the name where we can know that this stuff is used to simplify concurrent programming. Why do complications? Because we have to deal with multiple tasks, must be able to make full use of the hardware will reduce the processing time. Nature, CCR is a " task" as the core for the design, CCR code also can be divided into several functions as follows: description of tasks, generate tasks, scheduling tasks and duties.)