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| 31. | 2003年7月31日准备观看英仙座流星雨的时间到了。 |
| It is time to get ready for the Perseid meteor shower. |
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| 32. | Time Mean Speed |
| 时间平均速率 |
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| 33. | MTR (Mean Time of Remove) |
| 平均拆卸时间 |
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| 34. | average positioning time |
| 平均定位时间 |
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| 35. | MCT:Mean Corrective Maintenance Time |
| 平均矫正时间 |
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| 36. | mean repair time(MRT) |
| 平均修理时间 |
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| 37. | average flow time |
| 平均流程时间 |
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| 38. | MTTD (Mean Time to Detect) |
| 平均探测时间 |
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| 39. | mean time between defects |
| 故障平均间隔时间欠缺之间平均时间 |
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| 40. | mean time of flight |
| 平均飞行时间 |
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