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61. | on the trail of |
| 跟踪追赶 |
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62. | track and store unit |
| 跟踪存储器 |
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63. | track data file |
| 跟踪数据文件 |
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64. | temperature tracking |
| 温度跟踪 |
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65. | track transmitter |
| 跟踪发射机 |
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66. | tracking information |
| 跟踪信息 |
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67. | tracking camera |
| 跟踪摄影机 |
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68. | static surveillance |
| 定点跟踪 |
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69. | tracking equipment |
| 跟踪设备 |
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70. | television tracking |
| 电视跟踪 |
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