例句與造句

1. Hereafter being the forecasting to the old age population coefficient , this text has been applied two kinds of regression model , namely univariate linear model and logarithmic model , and thought over three kinds of economic speed of development ( high , middle , low ) in the logarithmic model to forecast the old age population coefficient respectively . finally , by analyzing the forecasted value and the inertia law of population development , the paper points out the lengthening of the population equally expected life span will push forward the aging of population step by step to the advanced age development ; the development trend of the population aging continues to be clear , and just appears a stage characteristic ; furthermore , the population aging speed in rural area will be faster than in the city
   此后是對(duì)老年人口系數(shù)的預(yù)測(cè)，本文應(yīng)用了兩種回歸模型，即一元線(xiàn)性回歸模型和對(duì)數(shù)擬合模型，并在對(duì)數(shù)擬合模型中考慮了經(jīng)濟(jì)發(fā)展速度的高、中、低三種方案，對(duì)老年人口系數(shù)分別進(jìn)行預(yù)測(cè)；最后在分析預(yù)測(cè)值和人口發(fā)展慣性規(guī)律基礎(chǔ)上對(duì)山東省未來(lái)人口老齡化發(fā)展趨勢(shì)作了較深入分析，指出人口平均預(yù)期壽命的不斷延長(zhǎng)，將逐步推動(dòng)人口老齡化向高齡化發(fā)展；人口老齡化繼續(xù)發(fā)展趨勢(shì)明顯，且呈現(xiàn)出階段性特征；農(nóng)村人口老齡化速度將快于城市。
2. It's difficult to find inertia law in a sentence. 用inertia law造句挺難的