securities investment funds的用法和樣例：
例句
- It is an important matter that performance of security investment funds is appraised in moden finance.
對證券投資基金的績效評估一直是現代金融理論的一個重要問題。 - And after 7-year development, the security investment funds have gradually grown into maturation from infantilism.
經過七年的努力，證券投資基金經歷了從無到有，從單一到多樣，從幼稚到成熟的發展過程。
