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来源:雅诚德英语网
The new study shows death rates among young people have fallen dramatically over the last 50 years across the globe.
最新研究表明,近50年来,青少年死亡率在全球范围内大幅度降低。
The new study shows death rates among young people have fallen dramatically over the last 50 years across the globe.
最新研究表明,近50年来,青少年死亡率在全球范围内大幅度降低。