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China formally entered the ageing society in 1999, now it has been in the aging acceleration period.
中国在1999年正式进入老龄社会,并已经进入加速老龄化时期。
youdao
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China formally entered the ageing society in 1999, now it has been in the aging acceleration period.
中国在1999年正式进入老龄社会,并已经进入加速老龄化时期。
youdao