combinatorial theory的用法和樣例：
例句
- Markowitz portfolio theory has become the footstone of modem finance theory.
摘要馬柯維茨的投資組合理論奠定了現代金融理論的基石。 - The optimization model of multi-product inventory with chance constrained attributes based on behavioral portfolio theory is established, which are solved as well.
結合行為證券投資組合理論建立了一種具有機會(huì )約束屬性的多產(chǎn)品庫存優(yōu)化模型，并給出了其求解算法。
