从宏观层次上把生产和消费作为一类生灭过程来研究。
From macroscopic layer, economic system is regarded as a class of growth process.
这些光点生灭太快，人实际上难于看清实际发生的情况。
They arise and pass too fast for one to really know what is actually happening.
这些光点生灭太快，人实际上难于看清实际发生的情况。
They arise and pass too fast for one to really know what is actually happening.
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