Toc indicates whether the thread of control is a process or a thread.

toc指示控制的线程是流程，还是线程。

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A particular thread of control works its way through multiple objects in the system.

但也有一个特殊的控制线程是通过系统中的多个对象进行工作的。

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He defined active objects as objects having their own thread of control (or, self-powered).

他将活动对象定义为具有自己的控制线程(或自己为自己提供支持)的对象。

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Manipulating the shape of the threads using this method, called thread-rolling, was thought to be impossible because it would be too hard to control the structure of the screw if metal oozed into odd shapes.

FORBES: Magazine Article