研究人员说，儿童学习第二语言的最佳途径是通过社会交往和日常可以接触到这种语言。
The researchers say the best way for children to learn a second language is through social interactions and daily exposure to the language.
通过与人交谈以及各种社会交往，我学到了许多东西。
By chatting with people and circulating in society I learned a lot of things.
社会交往、社会等级、亲属关系以及社会交换中的社会生物机制通过脑回前侧背面发生作用。
Sociobiological systems involved in peer affiliation, social hierarchy, kin recognition, and social exchange operate through the dorsal anterior cingulate gyrus.
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