Demography is the analysis of population variables.人口学是对人口变量的分析.The subject of demography has merged with that of reproductive strategies of organisms.关于生命统计这个课题已渗入了关于有机体繁殖对策的课题.His institute works on issues ranging from...
Messengers will relay your letters.邮递员将接转你的信件.They will relay your message.他们会转达你的口信.Lewis has recently recovered his fitness and will clash with Christie in the 4x100m relay.刘易斯近来恢复了状态，将在4×100米接力赛中和克里斯蒂一决雌雄。...