Objective to identify the language development in 2 to 4-year-old children.
目的了解2 ~4岁儿童正常的语言发育规律。
Paul Sullivan (see photo, L), a 37-year-old funeral director, is married with 2 children.
保罗·沙利文（图左）是葬礼师，现年37岁，已婚并是2个孩子的父亲。
Paul Sullivan (see photo, L), a 37-year-old funeral director, is married with 2 children.
保罗·沙利文（图左）是葬礼师，现年37岁，已婚并是2个孩子的父亲。
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