一个有用的理论，除了能够解释过去的观测，还有助于预测那些未被观测到的事件。
A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been observed.
利用实物期权理论可以对不确定性条件下的各种选择权进行定量分析，从而提供一个有用的投资决策框架。
By using the real option theory, all sorts of options can be analyzed quantitatively under an uncertain condition, which provides a useful framework for investment decision.
VB理论对化学思维是一个有用的工具。
贷款人对企业财务信息的关注不只是会计信息决策有用性的理论问题，更重要的是银行如何加强对贷款风险有效控制的一个非常实际的问题。
Lender's using of accounting information is not only a theoretical issue about the accounting information usefulness for decision making but also a practical problem in bank credit risk management.
帕兰梯和普雷斯科特的理论：一个社会的生产力不仅仅依赖于有用的知识的积累，而且还依赖于这个社会对于生产力加上的约束。
Parente and Prescott's theory: a society's productivity does depend on the set of constraints society imposes as well as the stock of useful knowledge.
本文就被幅值较高、频带很宽的不规则噪声信号所淹没的微弱有用信号的提取从理论上予以论证，并提出一个采用80C196KC单片机实现的方案。
The implication give evidence for picking up weak signal to be flooded by noise and set forth plan with the help of 80C196KC.
本文就被幅值较高、频带很宽的不规则噪声信号所淹没的微弱有用信号的提取从理论上予以论证，并提出一个采用80C196KC单片机实现的方案。
The implication give evidence for picking up weak signal to be flooded by noise and set forth plan with the help of 80C196KC.
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