相关变化率 (related rates) 的问题 ⇔ 已知一量的变 化率 (如, dx dt ), 问另一量 (如, dy dt ) 的变化率为何? 举例 说明如下.
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... 参数方程 parametric equation 相关变化率 correlative change rata 微分 differential ...
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高阶导数与相关变化率 Derivatives of higher order and relative rates of change
通过追踪从用例到业务用例、特性需求、测试，或者甚至其它用例，你可以更容易地衡量相关需求的变化所带来的影响，并验证覆盖率。
By tracing use cases to business requirements, feature-level requirements, tests, or even other use cases you can more easily measure the impact of change on related requirements and verify coverage.
我也希望如果在药物帮助下抑郁有所改观的话，那么也感到看到压力减少的相关变化，这同样会对减少痘痘的发作率。
I'm also hopeful that if the change in depression medication helps, that maybe I'll see a correlating change with reduced stress levels [that] maybe reduce acne as well.
2010年，世界各地艾滋病毒流行情况和当地的应对各有不同，相关趋势、进展率和结果也发生了变化。
In 2010, HIV epidemics and responses in different parts of the world vary with shifting trends, progress rates and outcomes.
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