目前将室颤心跳骤停人为地分为三阶段，即电阶段（electrical phase）、循环阶段(circulatory phase)和代谢阶段(metabolic phase)。电阶段持续约5分钟，电除颤常常可以取得明显效果，所以是主要干预措施。
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目前常熟人口与社会经济关系已步入良性循环阶段。
At present, the relationship between the population and the socioeconomics of Changshu is on the stage of benign circulation.
与此同时，为了确保有价值的原材料更容易在再循环阶段被回收，就必须更加注意产品设计。
At the same time, attention must also be paid to product design, to ensure that valuable raw materials are easier to recover in the recycling phase.
不同的产业处在不同的生命循环阶段上，不同的专业也分为新兴专业、成熟专业和衰退专业。
Different industries are at the different stages of their life circulation, and specialties are divided into more new industries, mature industries and declining ones.
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