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| 81. | The Stone Age; the computer age. |
| 石器时代；电脑时代 |
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| 82. | Secondly, the graph also shows that there were two stages of changes in the average age at first marriage |
| 其次，图表还显示，男性和女性的初婚平均年龄有两个阶段的变化：1900－1940年为第一阶段，1950－1987年为第二阶段。 |
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| 83. | November 1951--March 1952 |
| (一九五一年十一月——一九五二年三月) |
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| 84. | an age bracket; an age group |
| 年龄段 |
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| 85. | 2 years and above |
| 2 年以上含2 年 |
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| 86. | March 1980-June 1981 |
| （一九八○年三月——一九八一年六月） |
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| 87. | Year of Language Learning [1995] |
| 语文学习运动年〔一九九五年〕 |
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| 88. | under age; under the age limit |
| 未成年 |
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| 89. | annual delivery |
| 年执行额；年完成量 |
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| 90. | The Neolithic Age; New Stone Age' |
| 新石器时代 |
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