| 51. | a circle of trees, hills, spectators |
| 一圈树, 小山, 旁观者
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| 52. | standing in a circle |
| 站成一圈
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| 53. | a perfect circle , square |
| 正圆, 正方
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| 54. | the centre of a circle |
| 圆心
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| 55. | describe a circle with a pair of compasses |
| 用圆规画圆
|
| 56. | reason in a circle |
| 用循环论证法论证（循环论证是一种逻辑错误；以乙来论甲，而乙的真实性又是以甲来论证的）
|
| 57. | circle the globe |
| 环绕地球；环游世界
|
| 58. | the perimeter of a circle |
| 圆的周长
|
| 59. | draw a circle with ( a pair of ) compasses |
| 用圆规画圆
|
| 60. | draw a circle round a given centre |
| 围绕已知圆心画圆
|