HSK 7-9
念念不忘
niànniàn-búwàngto keep in mind constantly (idiom)
她对故乡的味道念念不忘。
Tā duì gùxiāng de wèidào niànniànbúwàng.
She cannot forget the flavors of her hometown.
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Appears across levels (7-9) in the HSK 3.0 word list.