操作系统维持着一个虚拟地址到物理地址的转换的表，以便计算机硬件可以正确地响应地址请求。
The operating system maintains a table of virtual address-to-physical address translations so that the computer hardware can respond properly to address requests.
解决方案是检查计算机与试验机的通讯线是否脱落；检查联机选择传感器是否选择正确；检查最近的试验或操作键。
The solution is to check the computer and test machine communication line is off; check the online selection of sensor is correct; check the last test or operation keys.
操作系统必须能够确保计算机系统的正确运行。
The operating system must ensure correct operation of the computer system.
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