克隆是一种快照形式，在其中获取可写入的快照。

A clone is a form of snapshot in which a snapshot is taken that is writable.

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在本例中，方法在进行分配前检查给定字符串指向可写入的目录。

In this case, the method checks that the given string points to a writable directory before making the assignment.

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返回系统代表关联进程分配的、可写入虚拟内存分页文件的内存量。

The amount of memory that the system has allocated on behalf of the associated process that can be written to the virtual memory paging file.

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