影子资源是临时文件，团队私有资源是对构造器不可见的配置文件。
Phantom resources are temporary files; team private resources are configuration files that should be invisible to builders.
要注意，在调用编译器之前，访问器要测试资源的两个标志：影子（phantom）和团队私有（team private）。
Note that before calling the compiler, the visitor tests two flags on the the resource: phantom and team private.
水资源影子价格是水资源价值计算的基础。
The evaluation of water resources value should be based on its shadow price.
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