当孩子们从一个学习阶段步入另一个学习阶段，参加或离开体育队，或是有了新的课外的兴趣爱好，那么，和朋友在一起互动的机会就会此消彼长。
As kids move from one academic track to another, join or leave sports teams, or take up new extracurricular hobbies, the opportunities to interact with friends wax and wane.
而她十几岁的哥哥，则是一名协调双语者，用两组概念来理解世界：在学校学习和使用英语，同家人跟朋友在一起时说的是西班牙语。
Her teenage brother, on the other hand, might be a coordinate bilingual, working with two sets of concepts, learning English in school, while continuing to speak Spanish at home and with friends.
幼儿园更关注于孩子和其他小朋友在一起玩儿，做事情要团结协作，学习知识。
Kindergartens are focused on kids playing together, doing things in groups, learning facts.
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