51. | If two edges of a graph are incident to the same pair of vertices, then these two edges are called parallel edges. |
| 如果一个图的两条边关联于同一对顶点,则这两条边称为平行边。
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52. | I found a couple of socks in the bedroom, but they don't make a pair . |
| 我在卧室里发现两只袜子, 但不成对。
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53. | I bought a pair of shoes yesterday. |
| 昨天我买了一双鞋。
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54. | This pair of pant was converted into shorts. |
| 这条裤子被改成了短裤。
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55. | I have a pair of leather mittens. |
| 我有一副皮连指手套。
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56. | This pair of trousers is too tight for me. |
| 这条裤子我穿太紧了。
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57. | I shall have to get a new pair of shoes; those I'm wearing have just about had it. |
| 我得买双新鞋;我穿的这一双快坏了。
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58. | They're an odd pair of friends. Sylvia is always bubbling over with nonsense and Polly as sober as a judge. |
| 他们是一对奇妙的朋友。西尔维亚总是热情,爱讲话,而波利又是那么严肃。
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59. | I use a pair of hairclippers and save barber's bill. |
| 我使用理发失推子,省下理发费。
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60. | I never like to break in a new pair of shoes. |
| 我最讨厌穿新鞋。
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