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41. | sampled population |
| 抽样总体 |
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42. | release sampling |
| 释放抽样 |
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43. | repeated sampling |
| 反复抽样 |
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44. | sampling consideration |
| 抽样考虑 |
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45. | selective sampling |
| 重要抽样 |
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46. | sample population |
| 抽样人口 |
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47. | checking investigation of sampling |
| 抽样复查 |
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48. | sampling apparatus |
| 抽样装置 |
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49. | sample mechanism |
| 抽样机构 |
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50. | sampling factor |
| 抽样因子 |
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