This is the 7846th most frequent Chinese word.
难以忘怀
Difficult to forget; unforgettable.
Here, '难以忘怀' is used to express a strong emotional impact that makes the experience unforgettable.
这场动人的电影让我难以忘怀。
This touching movie left an unforgettable impression on me.
'难以忘怀' here emphasizes the deep emotional importance connected to a cherished memory.
我们的友谊是我一生中难以忘怀的珍贵记忆。
Our friendship is a precious memory in my life that I find unforgettable.
In this sentence, '难以忘怀' describes the lasting impression created by the beauty of the song.