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老ける, 化ける, ふける
1. to age, to grow old (esp. in appearance), to show marks of age
衰老,变老(尤指外表),显露岁月痕迹、年を取る。
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调