For the population to stand still, each woman needs to have 2.1 children (one child per parent, plus an extra 0.1 to account for women who die young, are infertile, or otherwise do not have children).
要维持人口不变，每位育龄妇女就要抚养2.1个孩子(每位父母一方抚养的一位孩子不能生育，或者反过来说没有孩子，外加0.1个点补充年轻死亡的女性)。
You can see the carpenter or bricklayer or die-maker stand aside and admire the product of his personal skill.
你会看到一个木匠、砖匠或制模工站在一边，欣赏着用自己的技巧完成的作品。
You can see the carpenter or bricklayer or die-maker stand aside and admire the product of his personal skill.
你会看到一个木匠、砖匠或制模工站在一边，欣赏着用自己的技巧完成的作品。
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