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| 61. | erase pencil marks |
| 擦掉铅笔痕迹。 |
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| 62. | bear some trace (s) |
| 带有某些痕迹 |
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| 63. | electrochemical trace analyzer |
| 电化学痕迹分析仪 |
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| 64. | load-deformed mark |
| 荷载变形痕迹 |
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| 65. | memory trace |
| 记忆痕迹(心理学) |
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| 66. | machining marks |
| 机械加工痕迹 |
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| 67. | These marks won't rub off. |
| 这些痕迹擦不掉。 |
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| 68. | The trace is clear |
| 痕迹甚显 |
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| 69. | dendritic markings |
| 师状痕迹 |
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| 70. | No trace remains. |
| 没有留下痕迹。 |
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