德国人口2021总人数是多少?负增长背后3大真相,2021年德国人口负增长揭秘,总人数与三大真相探析
What was the total population of Germany in 2021? Three Major Truths Behind Negative Growth: Unveiling Germany's Population Negative Growth in 2021 and Exploring the Total Population and Three Major Truths
以上为机器翻译结果，长、整句建议使用 人工翻译 。