随着年龄增长,他的视力逐渐变弱。

As he got older, his eyesight gradually weakened.

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As he got older, his eyesight gradually weakened.

eyesight 是由 eye(眼睛)和 sight(视力、视野)组成的复合名词,字面意思是"眼睛的视觉能力",即"视力"。

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