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41. | scattered observatio |
| 分散观察 |
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42. | observing pattern |
| 观察模式 |
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43. | observing system |
| 观察系统 |
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44. | radiosonde observation |
| 探空仪观察 |
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45. | hour of observation |
| 观察时间 |
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46. | batching tracking |
| 分批观察 |
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47. | controlled observation |
| 控制观察 |
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48. | routine observation |
| 定期观察 |
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49. | audit observation |
| 审计观察 |
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50. | repeated observation |
| 重复观察 |
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