These policies intervene either supplies or demands, may divide into non-material and the material two aspects specifically.
这些政策要么干预供给，要么干预需求，具体可分为非物质和物质两方面。
These policies intervene either supplies or demands, may divide into non-material and the material two aspects specifically.
这些政策要么干预供给，要么干预需求，具体可分为非物质和物质两方面。
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