这儿我们看到有个学习语言的关键期。
What we see here is that language has a critical period for learning.
因此把住这个人格成长关键期至关重要。
Therefore Bazhu this critical period of growth is essential personality.
学校体育阶段，则是体育锻炼习惯形成的关键期。
E. is a key phase to the formation of the habit of physical exercises.
学校体育阶段，则是体育锻炼习惯形成的关键期。
E. is a key phase to the formation of the habit of physical exercises.
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