重点讲解：
1. compared with 与…相比；和…比起来；
例句：Our price is attractive as compared with that in the international market.
与国际市场相比，我们的价格是有吸引力的。
2. contribute to （为…）做贡献；
例句：Many specialistic techniques contribute to archaeology.
许多专业技术对考古学作出贡献。
3. cut back on 减少；削减；缩减；
例句：We really need to cut back on our spending.
我们真的需要削减我们的开支。
4. year on year 年同比，与前一年同期比较；
例句：Spending has increased year on year.
与去年同期比较，开销增加了。
5. refer to 指的是；
例句：The terms supply and demand refer to the behaviour of people as they interact with one another in markets.
供给和需求两个术语指人们在市场上相互交易时的行为。