该实用程序的返回值实际上属于numbergeneratorasync类型，这是主接口的异步版本。
The return value of that utility is actually of type NumberGeneratorAsync, which is the asynchronous sibling of the main interface.
并通过实际测量主振系统的振动频率和幅值大小，研究了诸因素对再生颤振的影响。
Measuring the amplitudes of vibrational system. we explore all kinds of factors that influence regeneration chatter.
由于主类型容纳了实际的值，而且并非指向一个对象的句柄，所以在为其赋值的时候，可将来自一个地方的内容复制到另一个地方。
Since the primitive holds the actual value and not a reference to an object, when you assign primitives you copy the contents from one place to another.
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