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| 51. | acquire proficiency in math. |
| 在数学上达到熟练水平 |
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| 52. | grant certificates of proficiency |
| 准许发给业务合格证书 |
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| 53. | rope scouring machine |
| 绳状精练机 |
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| 54. | State Putonghua Proficiency Test |
| 国家级普通话水平测试 |
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| 55. | degumming agent |
| 脱胶剂,精练剂 |
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| 56. | Try and reduce it to its simplist essentials. |
| 尽量使之精练。 |
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| 57. | EPT [English Proficiency Test] |
| 英语水平考试 |
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| 58. | a test of proficiency |
| 水平测试 |
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| 59. | fatigue decreased proficiency boundary |
| 疲劳减少熟练分界线 |
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| 60. | proficiency in language usage |
| 语言修养 语言修养 |
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