Tā chángcháng miǎnhuái zài jiāxiāng dùguò de tóngnián shíguāng.
She often fondly recalls her childhood years spent in her hometown.
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缅怀 is a formal, literary word used in solemn contexts such as memorials, eulogies, and official speeches. In casual speech, 怀念 (huáiniàn) or 想念 (xiǎngniàn) are more natural.