This paper presented two fertility rate models, i. e., lognormal distribution model and Poisson distribution model.Based on these two models, a composite model was proposed.是什么意思_This paper presented two fertility rate models, i. e., lognormal distribution model and Poisson distribution model.Based on these two models, a composite model was proposed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句