可以用这个对象创建计时器、调度其他线程上的工作和控制导入的事务，在本系列的第2部分中将更详细地讨论所有这些内容。
You can use this object to create timers, schedule work on other threads, and control imported transactions, all of which I'll cover in more detail in Part 2 of this series.
计时器的工作原理类似于恒温器，当温度变化时，两种不同金属以不同速率缩小或膨胀。
The timer worked like a thermostat, on the principle that two different kinds of metal will expand and contract at different rates when their temperature changes.
计时器开始了，每个人都疯狂地干自己的工作，将完成的物品放入循环中他们和下一个人之间的装配线上。
The timer began, and everyone started to work frantically at their task, placing completed items on the circle between them and the next person on the assembly line.
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