书屋作文网相关expansion的作文精选
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![Population expansion作文]( "Population expansion作文")
Population expansion作文
Populationexpansionisoneofthemostseriousproblemsintheworld.Withbetterhygienicconditionsandbettermedicalcare,fewerbabiesdietoday.Butthebirthrateremainsunchanged.Moreover,thedeathratehasbeenloweredconsi...
