But economists say families about to go into debt to fund four years of partying, as well as studying, can console themselves with the knowledge that college is an investment that, unlike many bank stocks, should yield huge dividends. (09.6 Passage 2)
　　主干：...economists say (families... can console themselves with...)
　　1. say后面的內容都是say的賓語。該賓語從句的主語是families，其后又一個不定式短語to go...修飾；不定式to fund...作前一個不定式to go into debt的目的狀語；as well as相當于一個并列連詞，連接partying和studying。
2. knowledge后的that從句作其同位語，說明“該知識”的具體內容；an investment后的that引導的是定語從句，從句的主語和謂語被插入成分unlike...隔開了。
　　譯文：不過經濟學家說大學是一項投資，而且和許多銀行股票不同的是，這項投資可以帶來巨大的紅利，打算舉債來提供4您狂歡和學習資金的家庭在知道這一點之后可以有所安慰了。