例如出生人口性别比偏高、人口老龄化等.These problems include the high sex ratio and the growing population aging.使中国人口老龄化达到了前所未有的水平.China's population is aging at unprecedented levels.同样,山西省也面临着人口老龄化的巨大挑战.Shanxi province is also confr...
CENETIC AND SUBSPECIES DIVERGENCES WITHIN THE RED PANDA ( CARNIVORA: PROCYONIDAE )小熊猫种内遗传及亚种分化研究 ( 食肉目: 浣熊科 )Among tham , 7 species is belonged to Rodenria, and Carnivora, Chiroptera and Insectivora only have 1 species r...