这种疾病会缓慢破坏神经元和控制自主肌的神经细胞，直至病人不能运动甚至说话。

The disease gradually destroys neurons or nerve cells that control voluntary muscles to the point where eventually patients can't move or even speak.

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说话缓慢轻柔表明他内心极度的悲伤焦虑。

Slow soft speech points to extreme sadness and anxiety.

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她以她那种缓慢的、懒洋洋的方式拖长声调地说话。

She drawled in that slow, lazy style of hers.

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