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| 1. | What is the perimeter of this polygon? |
| 这个多边形的周长是多少? |
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| 2. | outer perimeter |
| 外周长 |
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| 3. | perimeter of airway |
| 风巷周长 |
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| 4. | Work out how long the perimeter of the playground. |
| 请你算一算体育场的周长是多少米？ |
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| 5. | inner perimeter |
| 机场的内周长 |
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| 6. | the perimeter of a rectangle; |
| 一个矩形的周长； |
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| 7. | basin perimeter |
| 流域周长；流域周界 |
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| 8. | it's the perimeter that poses the greatest problem. |
| 就是大楼的周长造成了最大的问题 |
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| 9. | perimeter-to-cross section ratio |
| 周长-截面比 |
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| 10. | What about its perimeter? |
| 师：图形的形状变了，而周长怎样？ |
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