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| 31. | A clock measures time. |
| 钟用来计时。 |
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| 32. | acoustic timing |
| 声音计时 |
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| 33. | calendar subroutine |
| 计时子程序 |
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| 34. | delta-T timing unit |
| 时差计时单元 |
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| 35. | 全球行动周由联合国教科文组织的伙伴机构全球教育宣传运动（Global Campaign for Education）组织。 |
| 登记参与网上论坛：http://www.unesco.org/education/forum/gforum.cgi?do=user_signup |
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| 36. | automatic officiating equipment |
| 自动计时设备 |
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| 37. | it's the only card that allows him access to the NetJets, a world-class fleet of aircraft. |
| 这是登机计时卡,一流飞机的计时卡 |
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| 38. | clock pulse source |
| 计时脉冲源 |
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| 39. | velocity measuring chronograph |
| 测速计时仪 |
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| 40. | accumulative timing |
| 积累计时法 |
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