别重新发明轮子了。wiki上有结论；一般人知道这个结论就可以了。

送交者: Amsel 于 2008-01-06, 18:27:37:

回答: 说说TFR和Replacement rate，错误处请统计学家们指正。。。由 mangolasi 于 2008-01-06, 18:24:51:

The replacement fertility rate is roughly 2.1 births per woman for most industrialized countries but ranges from 2.5 to 3.3 in developing countries because of higher mortality rates.

http://en.wikipedia.org/wiki/Total_fertility_rate

所有跟贴:

the mortality rate is the mortality rate before finishing - mangolasi (643 bytes) 2008-01-06, 18:31:01 (196279)

加跟贴