根据科斯·格洛夫的说法，平均而言，这种生产量是稳定的，意味着两个父母将被两个孩子取代。
On average, says Cosgrove, the yield is "stable," meaning that the two parents will be replaced by two children.
雄体的平均密度和生产量在各食物浓度下无显著差异。
No significant differences among food concentrations in the mean density and the production of males were observed.
同时还研究了林分平均净生产量和产量结构。
The structure of output and productive forces have been examined.
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