Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease, selectively involving the upper and lower motor neurons that control voluntary movement.是什么意思_Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease, selectively involving the upper and lower motor neurons that control voluntary movement.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句