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51. | winner's circle |
| (赛马场附设供拍照、领奖等活动的)优胜者(与人会见的)小(圆)场地 |
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52. | arterial circle |
| 动脉环 |
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53. | Antarctic Circle |
| 南极圈 |
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54. | information circle |
| 情报循环 |
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55. | bolthole circle |
| 螺栓孔分布圆 |
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56. | stress circle |
| 应力圆 |
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57. | centre circle |
| 中圈 |
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58. | cultural circle |
| 文化圈 |
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59. | counterclockwise circle |
| 反时针全旋 |
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60. | migration circle |
| 运移范围 |
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