“这目前还不清楚”同时“也是许多人思索的话题，”一个致力于回答这个问题的研究团队报告说。
"It has remained unclear" and "has been the topic of much speculation," report a team of researchers who aimed to answer just that question.
他回忆说2007年当之前的关于儿童死亡率的老报告发表的时候，健康指标和评估研究所团队就发布过类似的研究声明。
He recalls that the IHME team made similarly grand claims when its previous study on child mortality was unveiled in 2007.
他回忆说2007年当之前的关于儿童死亡率的老报告发表的时候，健康指标和评估研究所团队就发布过类似的研究声明。
He recalls that the IHME team made similarly grand claims when its previous study on child mortality was unveiled in 2007.
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