他有轻微的神经颤抖症。
红核颤抖症是一种少见的运动疾患，它的发生通常和中脑的病变有关。
Rubral tremor is a rare movement disorder that occurs typically with midbrain damage.
跟我一样，他也有点口吃，患有手部会有不自觉动作的“原发性颤抖症”，这使得他看起来很脆弱。
Like me, he has a speech impediment and a condition called "essential tremor" that causes involuntary hand movements, which make him look more fragile than he is.
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