The only real actions taken by a Customer object are checking the simulated time at a couple of points, and logging some durations to the waittime and checkouttime monitors.
Customer对象所采取的实际操作仅仅是检查几个点上的模拟时间，并将持续时间记录到waittime和 checkouttime监控程序中。
The only real actions taken by a Customer object are checking the simulated time at a couple of points, and logging some durations to the waittime and checkouttime monitors.
Customer对象所采取的实际操作仅仅是检查几个点上的模拟时间，并将持续时间记录到waittime和 checkouttime监控程序中。
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