兄弟姐妹的帮助

从社交角度来说,有兄弟姐妹可能比独生子女更好

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大众科学 Magazine Vol 291 Issue 4This article was originally published with the title “The Service of Siblings” in 大众科学 Magazine Vol. 291 No. 4 ()
doi:10.1038/scientificamerican102004-4cDFXMKaYAfOvaOTgpavIg
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