Laurence-Moon syndrome is a rare hereditary condition associated with retinitis pigmentosa, spastic paraplegia, hypogonadism and mental retardation.是什么意思_Laurence-Moon syndrome is a rare hereditary condition associated with retinitis pigmentosa, spastic paraplegia, hypogonadism and mental retardation.在线翻译_英语_读音_用法_例句