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51. | African Research Bulletin |
| 非洲研究公报 |
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52. | placard walls |
| 在墙上张贴布告 |
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53. | hammer down the announcements on the walls |
| 把布告钉在墙上. |
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54. | Bulletin Board Systems |
| 公告板系统 |
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55. | No doubt he read the proclamations. |
| 他一定看过布告。 |
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56. | Archives Science Bulletin |
| 《档案学通讯》 |
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57. | Uniled Nations Bulletin |
| 联合国公报 |
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58. | Commodity Price Bulletin |
| 商品价格月报 |
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59. | Africa Research Bulletin |
| 《非洲研究公报》 |
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60. | Bulletin de Statistique |
| 统计公报 |
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