短語詞組短語population n trends 人口趨勢(shì)world population trends 世界人口趨勢(shì)Population Trends Obviously 人口聚集趨勢(shì)明顯Human Population Trends and Implications 人口變化趨勢(shì)及影響population -aging trends in shaanxi 人口老齡化趨勢(shì)development trends of population 人口變動(dòng)趨勢(shì) 返回 population trends