Realized natality rate of population is 49.8069%, ecological mortality rate is 14.9485%, in the same year, yearling birds were born lowest survival rate Sx = 59.57% , therfore, conservation of the wild yearling birds must be strengthened.是什么意思_Realized natality rate of population is 49.8069%, ecological mortality rate is 14.9485%, in the same year, yearling birds were born lowest survival rate Sx = 59.57% , therfore, conservation of the wild yearling birds must be strengthened.在线翻译_英语_读音_用法_例句