| 1. | A zoo is a very costly establishment . 动物园是一个花费极大的机构。 |
| 2. | The windows were draped with costly hangings . 窗上全挂着贵重的窗帘。 |
| 3. | This made books costly and rare . 这使书籍的价格昂贵而且稀少。 |
| 4. | Opponents say the project will be too costly . 反对者们说这个项目代价太高。 |
| 5. | Intervention by central banks became very costly . 由中央银行干预的代价很大。 |
| 6. | His obese figure arrayed in costly apparel . 他的肥胖的身躯穿着一身考究的服装。 |
| 7. | It was a costly mistake . 这是一个使我们吃了大亏的错误。 |
| 8. | At least, the operation would have been very costly . 至少此一行动是需要较高代价的。 |