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| 51. | alternate Saturday-off system |
| 长短周制度 |
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| 52. | "Good - bye, Mr. Zhou. " |
| 再见,周先生。 |
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| 53. | To relieve poor children |
| 周济贫童 |
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| 54. | Disarmament Week Kits |
| 裁军周资料袋 |
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| 55. | A periodontal ligament. |
| 牙周韧带 |
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| 56. | isoperimetric figure |
| 等周形 |
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| 57. | a monthly weekly ] publication |
| 月周]刊 |
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| 58. | circumstellar envelope |
| 星周包层 |
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| 59. | circumstellar matter |
| 星周物质 |
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| 60. | Chou Liang -hsun |
| 周染勋 |
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