婴儿笑声
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认识一位拥有最令人愉快工作的科学家：他专门研究婴儿笑声
Babies start laughing before they can speak, and this delicious sound just may serve as a powerful source of human communication and connection, says psychology researcher Caspar Addyman.
Babies start laughing before they can speak, and this delicious sound just may serve as a powerful source of human communication and connection, says psychology researcher Caspar Addyman.
