accumulative contribution rate的用法和样例：
- In the enterprise informative management course, it requires to reach popularity rate, integrated rate and contribution rate.
- Its contribution rate is 0.6124. On defensive man, relieving opponent's attack successfully depends on act situation.
- A model about valuing the contribution rate of economy growth was built, based on three kinds of datum.
- The key of ROA model is to observe the changing of contribution rate of intangibles.