Senile dementia is a common degenerative disease of center nervous system in old age.The pathogeny and pathomechanism haven t been made clear.是什么意思_Senile dementia is a common degenerative disease of center nervous system in old age.The pathogeny and pathomechanism haven t been made clear.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句