footstone的例句（footstone在句子中的用法）

• Interaction is a new - fashioned network defense strategy, interaction model is footstone of intrusion protection system. 联动是一种新型的网络防护策略, 联动模型是入侵防御体系的基石.
• Loyalty: is the footstone of life. 忠诚: 是建筑人生大厦的基石.
• Markowitz portfolio theory has become the footstone of modem finance theory. 摘要马柯维茨的投资组合理论奠定了现代金融理论的基石.