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| 81. | a zoologist who studies birds. |
| 研究鸟类的动物学家。 |
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| 82. | Birds reproduce by laying eggs. |
| 鸟类由产卵繁殖。 |
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| 83. | observe the behaviour of birds |
| 观察鸟类的行为 |
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| 84. | Bird and nature photography |
| 鸟类及自然摄影 |
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| 85. | Birds differ from mammals. |
| 鸟类与哺乳动物不同。 |
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| 86. | Mai Po Bird Sanctuary |
| 米埔鸟类保护区 |
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| 87. | avian adenovirus infection |
| 鸟类腺病毒感染症 |
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| 88. | the transoceanic migration of birds |
| 鸟类的越洋迁徙. |
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| 89. | International Council for Bird Preservation |
| 国际保护鸟类理事会 |
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| 90. | Birds can see colour. |
| 鸟类能看到颜色。 |
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