birthrate的精選

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用“birthrate”造句大全，birthrate造句

用“birthrate”造句大全，birthrate造句

2018-06-24
Thenewbirthratehasdecreasedfromlastyear's.Thebirthrateinthecityhasbeendecreasing.Thebirthrateinthiscityisincreasingataratioof0.6toathousandeveryyear.Withanincreasedlifeexpectancyandadecreasedbirthrat...