结构中所涉及到的特定产品系统所施加的限制条件(一般是资源限制条件，例如内存以及对数据库连接的最大连接数量)。

Constraints imposed by the specific production systems involved in the architecture (typically resource constraints, such as memory or maximum number of connections to the database machine).

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以2为底的对数一般出现在算法分析中。

Logs base 2 tend to show up in algorithm analysis.

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对数百个品种的狗统计发现，它们的寿命一般在8到16岁不等。

Typical lifespans among the hundreds of canine breeds can range from 8 to 16.

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