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.
用一些简单明了的句子描述每种感觉，保持五种感觉的句子长度相等。
Write a few sentences about each feeling; keep each section approximately the same length. Speak in simple terms.
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