14 pairs were recorded there in helicopter surveys in 1984,but only 6 birds representing at most 3 pairs were recorded 16 years later.3841 后面的representing at most 3 pairs were recorded 怎么翻译

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14pairswererecordedthereinhelicoptersurveysin1984,butonly6birdsrepresentingatmost3pairswererecorded1

14 pairs were recorded there in helicopter surveys in 1984,but only 6 birds representing at most 3 pairs were recorded 16 years later.3841 后面的representing at most 3 pairs were recorded 怎么翻译
14 pairs were recorded there in helicopter surveys in 1984,but only 6 birds representing at most 3 pairs were recorded 16 years later.3841 后面的representing at most 3 pairs were recorded 怎么翻译

14 pairs were recorded there in helicopter surveys in 1984,but only 6 birds representing at most 3 pairs were recorded 16 years later.3841 后面的representing at most 3 pairs were recorded 怎么翻译
6 birds representing at most 3 pairs
6只鸟代表了至少是3对鸟
recorded被记录下来
雌雄1对2只
大概是记录什么生态的文章

14对已经记录在直升机调查,但只有在1984年6鸟代表至多3