把应用程序划分为一系列层有助于收缩问题的范围，可以简化容量扩展。
Breaking down the application into a series of tiers helps to reduce the scope of the problem, and allows for easier scaling.
在第二层“收缩”的觉知状态中，人能察觉到自己的存在。而在第一层面时人只有食物的觉知。
In the second level, which is shrunken consciousness, one is aware that he exists. In the first level one is only food conscious.
公司层战略主要有三种：增长战略，稳定战略和收缩战略。
There are three main types of corporate strategies: growth, stability, and renewal.
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