如果这个工作单元超时的话，它会被送到另一台宿主机器上。
When it times out after the deadline, the work will simply be sent to another host machine.
除错器在宿主机上运行并且通过串口或网络连接到目标机上。
The debugger runs on a host computer and connects to the target through a serial port or network connection.
由于执行的速度与宿主机器相当，所以类似这样的程序可以降低模拟的成本。
Programs like this reduce the cost of emulation by generally performing at speeds comparable to the host machine.
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