抛开物种不谈，任何生物一旦老去，就变得迟钝，易患关节炎、糖尿病、癌症和老年痴呆。

But old creatures, regardless of species, tend to be less agile than young ones, and more likely to suffer from arthritis, diabetes, cancer, heart disease, and mental confusion.

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头晕、头痛、反应迟钝、智力减退、精神异常、抽风、偏瘫、痴呆等。

Dizziness, headache, unresponsive, mental decline, mental abnormality, ventilation, hemiplegia, such as dementia.

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