目的了解正常儿童普通话平均句子长度（MLU）。
Objective To understand the Mandarin normal children average sentence length (MLU).
结果他的语言样本数据统计结果表示他的平均句子长度为3.9。
Results The statistical results of his language sample data that his average sentence length of 3.9.
被试的平均句子长度为2.07，仅相当于2岁左右正常儿童的水平；
MLU used by the child is 2.07 which is the level of 2-yearold ordinary children;
被试的平均句子长度为2.07，仅相当于2岁左右正常儿童的水平；
MLU used by the child is 2.07 which is the level of 2-yearold ordinary children;
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