The rate of cow's oestrum fecundation is one key factor of cattle's breedingrate.
奶牛情期受胎率是影响奶牛繁育率的重要因素之一。
2
The giant pandas' naturally slow breedingrate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human-related causes of mortality.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
3
The giant pandas ' naturally slow breedingrate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human - related causes of mortality.