national adj.民族的；国家的；全国性的；国立的；国有的n.国民（复）nationals:全国性比赛.
详细释义
Noun:
a chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions
any muscular weakness
双语例句
用作名词 (n.)
Myasthenia gravis(MG) is an autoimmune disease. 重症肌无力(MG)是一种自身免疫病。
Since from 1994, I have suffered from finger weakness, occasional muscular spasm and intermittent myasthenia in face and upper body. 自1994年起，我的手指开始变得无力，脸部和上身肌肉不定期痉挛和间歇性衰弱。
