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51. | practice ground |
| 试验用地 |
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52. | practice teacher |
| ph.1. 实习教师 |
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53. | practice workshop |
| 实习车间 |
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54. | business practice |
| 营业惯例 |
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55. | practice Board |
| 练习板墙 |
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56. | practice factor |
| 实施系数 |
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57. | usual practice |
| 习惯做法 |
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58. | practice theory |
| 练习说 |
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59. | procurement practice |
| 采购方法 |
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60. | horticultural practice |
| 园艺实务 |
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