FXS is characterized by X-linked mental retardation with additional features such as a long face with large protruding ears, macroorchidism, and eye-gaze avoidance etc.
其主要临床特征为智力低下、特殊的外貌特征（包括长脸、大耳廓、下颌突出、巨头、腭弓高、大睾丸等）、行为及认知障碍、多动、注意力难集中以及孤独、自闭等症状。
FXS is characterized by X-linked mental retardation with additional features such as a long face with large protruding ears, macroorchidism, and eye-gaze avoidance etc.
其主要临床特征为智力低下、特殊的外貌特征（包括长脸、大耳廓、下颌突出、巨头、腭弓高、大睾丸等）、行为及认知障碍、多动、注意力难集中以及孤独、自闭等症状。
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