在某些操作系统上，对任一时间内可拥有图像的数量有严格限制，因此使用它们时必须注意这一限制。
On some operating systems, there is a strict limit on the number of images you can have at any one time, so you must be aware of this restriction when using them.
选出待分派的作业或任务。在某些操作系统中，其它作业单位，诸如输入输出操作，也可被调度。
To select jobs or tasks that are to be dispatched. In some operating systems, other units of work such as input-output operations may also be scheduled.
在某些操作系统下，具有最高优先级(相对于可执行线程而言)的线程经过调度后总是首先运行。
Under some operating systems, the thread with the highest priority (of those threads that can be executed) is always scheduled to run first.
前者是一种非常快速的方法，但是在某些操作系统中，对于一些非标准的文件，如管道和设备，可能会出现问题。
The former is a very quick method but, on some operating systems, you might experience problems with non-standard files, such as pipes and devices.
在某些操作系统上，度量线程CPU 时间所需的microaccounting总是打开的，所以getCurrentThreadCpuTime没有额外的性能影响。
On some OSs, the microaccounting needed to measure thread CPU usage is always turned on, so getCurrentThreadCpuTime causes no additional performance hit.
在某些情况下，主机操作系统就是管理程序。
在某些情况下，你将为已经习惯于在命令行操作系统和应用程序中工作的用户设计。
In some cases, you will be designing for users who are accustomed to working on command-line operating systems and the applications made for them.
这种方法的缺点是客户操作系统必须针对PV进行修改，优点是在某些情况下您可以得到近乎本机的性能。
The downside to this approach was that the guest operating system had to be modified for PV. The upside was that you can achieve near-native performance in some cases.
在向公众发布前，该公司还通过一个站点来展示基于Android操作系统的应用，以此来用商店去测试某些应用。
The company also USES the store to test some apps before they're released to the public, through a site that showcases apps for the Android operating system.
在某些情况中，这个系统管理程序就是一个操作系统；此时，它就称为主机操作系统，如图1所示。
In some cases, the hypervisor is an operating system; in this case, it's called the host operating system, as shown in Figure 1.
如果操作系统缺陷、磁盘坏扇区或某些超级用户失误会破坏文件系统，使用多个卷可以把破坏的范围限制在一个卷。
If an operating system bug, bad disk sector, or even certain superuser errors cause corruption to a file system, using multiple volumes can limit that damage to just one volume.
在某些很少见的情况下，并不关心应用程序隔离，但是希望以不同的操作系统身份运行应用程序以便审计，那么可以使用第三种方法。
In rare cases, where application isolation is not a concern but running applications under different operating system identities for accounting purposes is desirable, the third approach can be used.
在某些情况下，可能还必须在迁移前升级操作系统。
In some cases, an operating system upgrade may also be necessary prior to migrating.
在某些情况下，来宾操作系统与控制程序使用相同的CPU，而在另外一些情况下，则可能不同(比如PowerPC来宾操作系统在x86硬件上运行)。
In some cases, the guest operating system is targeted to the same CPU as the control program, but other cases may be different (for example, a PowerPC guest running on x86 hardware).
在快速失败切换期间，当ap或ein硬件、操作系统、平台软件或某些应用程序软件出现故障时，所有稳定呼叫都会掉线。
During a quick failover, all stable calls are lost when ap or EIN hardware, Operation System, platform software, or some application software faults occur.
在快速失败切换期间，当ap或ein硬件、操作系统、平台软件或某些应用程序软件出现故障时，所有稳定呼叫都会掉线。
During a quick failover, all stable calls are lost when ap or EIN hardware, Operation System, platform software, or some application software faults occur.
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