此变量指向包含自动化资源的工作区。
This variable points to the workspace that contains your automation resources.
资源，与变量极为相似，但是一般是粗粒度的。
Resources, which can be best compared to variables, but are typically coarse grained.
竞争条件的典型解决方案是，确保程序在使用某个资源（比如文件、设备、对象或者变量） 时，拥有自己的专有权。
The typical solution to a race condition is to ensure that your program has exclusive rights to something while it's manipulating it, such as a file, device, object, or variable.
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