spring rate的用法和樣例：
例句
- Populations tend to grow at an exponential rate.
人口趨向於以指數比率增長。 - What is the Bachelor's degree rate of Beijing?
北京市人口的大學文憑比率是多少？ - The maximum current speed and SSC occour during spring ebb, and the minimum one occours during neap flood.
最大流速和含沙量都發生在大潮落潮，最小流速和含沙量都發生在小潮漲潮。
