reproducing pair造句

"reproducing pair"是什么意思

造句与例句手机版

While Norway, Germany, Poland and Iceland harboured the largest surviving populations, pockets of reproducing pairs remained in several other countries.
Vigorous flocks with many juveniles and reproducing pairs were noted as late as 1896, and the birds were long-lived in captivity, but they had virtually disappeared by 1904.
It's difficult to see reproducing pair in a sentence. 用reproducing pair造句挺难的

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