51. | The pen slid from his hand. |
| 钢笔从他的手中滑落。
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52. | The pen slipped from his hand. |
| 钢笔从他手中滑落。
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53. | You could do it with a stroke of the pen . |
| 你大笔一挥就行了。
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54. | My pen does not function very well. |
| 我的钢笔书写不太流利。
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55. | He sat trifling with a pen . |
| 他坐在那儿,手里摆弄着一支钢笔。
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56. | His delight was in the use of the pen . |
| 他的爱好是写做。
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57. | The pen writes smoothly. |
| 这支钢笔书写流畅。
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58. | My fingers are so contracted that I cannot hold my pen . |
| 我的手指痉挛得连钢笔也握不住。
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59. | In the midst of all this movement, the weight and the pen would be still. |
| 假定地震发生了,地板、纸、你和你的手都会动,重物和笔却不动。由于纸在笔下来回运动,纸的表面就会用墨水记录下地板运动的情况。
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60. | But as the paper moved from side to side under the pen point, its movement would be recorded in ink upon its surface. |
| 根据这一原理,制造出了最初的地震仪器,但是纸是卷在慢慢放置的圆筒上的。
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