An specie of animal will die out from not giving birth to enough offsprings.
An specie of animal will die out from not giving birth to enough offsprings.
一个动物物种如果不能在每一代生育足够数量的后代,那它就要灭绝.
An specie of animal will die out from not giving birth to enough offsprings.
一个动物物种如果不能在每一代生育足够数量的后代,那它就要灭绝.