The SDR was created in 1969, during the Bretton Woods fixed exchange-rate system, because of concerns that there was insufficient liquidity to support global economic activity.
SDR始创于1969年，当时正处于布雷顿森林固定汇率体系中。创立其目的是为了解决当时支持全球经济活动资金流动性不足的问题。
While analysising economy activity afterwards, the decision is proved effectively. (3) Volume-price decision support system for chemical product is designed and implemented.
在事后的经济活动分析中，决策被证明是切实有效的。（3）设计和实现化工产品量价决策支持系统。
At the same time, apply the activity-based cost management is still need the support of the computer system. And it must put forward step by step.
同时，应用作业成本管理还需要计算机系统的支持，循序渐进，以点带面，分阶段予以推进。
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