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41. | questioning age |
| 好问年龄 |
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42. | carpal bone age |
| 腕骨年龄 |
|
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43. | evolutionary age |
| 演化年龄 |
|
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44. | radioactive age |
| 放射性年龄 |
|
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45. | age of responsibility |
| 责任年龄 |
|
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46. | child-bearing age |
| 生育年龄 |
|
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47. | ageism; age discrimination |
| 年龄歧视 |
|
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48. | radiometric age |
| 绝对年龄 |
|
|
| |
49. | age-sex structure |
| 年龄性别结构 |
|
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50. | astronomical age |
| 天文年龄 |
|
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