在阐述了清洁生产概念、特点的基础上，给出了清洁生产方案。
On the basis of describing the concept and features of clean production, the strategy of clean production is given.
事实上，生产力的概念本身就是时钟的副产品：一旦工作表现与统一的时间单位可以联系起来，工作就永远都不一样了。
Indeed, the very notion of productivity is a by-product of the clock: once one can relate performance to uniform time units, work is never the same.
通过示例深入了解概念但又不用考虑生产代码是很有意思的。
Playing with the concepts without worrying about your production code is a lot of fun.
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