| 11. | Those who are quick to promise are generally slow to perform . |
| （谚）轻诺寡信。
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| 12. | A university should fulfil [ perform ] its social function. |
| 大家应该履行它的社会职能。
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| 13. | He has a double function to perform . |
| 他有双重职责要履行。
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| 14. | perform a favour for sb. |
| 帮助某人。
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| 15. | Every component of an aircraft has a specifiable function to perform . |
| 飞机上的任何一个部件都有具体明确的功能。
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| 16. | It has another vital function to perform . |
| 它还要起另外一个重要作用。
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| 17. | Though it may be possible to measure the value of material good in terms of money, it is extremely difficult to estimate the true value of the services which people perform for us. |
| 虽然物质产品的价值可以用金钱来衡量，但要估算别人为我们为所提供的服务的价值却是极其困难的。
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| 18. | I have a task to perform . |
| 我有一件工作要做。
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| 19. | perform /do acrobatics |
| 表演杂技
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| 20. | to perform with eclat |
| 大为成功地表演
|