middle and smamll investors的用法和樣例：
例句
- Particularly in some type of office building sales, Class B concept confusion, the small investors are easily misled.
尤其在一些銷售型辦公樓中，甲級乙級概念混淆，易使中小投資者受誤導。 - Examples are given to explain the choices of different investment portfolios in regard to the large and small investors in the Security Market at present.
最後運用具體的股票投資組合實例，分析了大中型機構投資者和中小投資者在投資組合方面的不同取向。
