难忘的单词是：unforgettable.
例句：电影音乐可以制作得令人难忘，因为其主旋律在影片中反复出现。
Movie music can be made memorable because its themes are repeated throughout the film.
（图片来自网络侵删）
我很高兴我有这个难忘的经历。
I am so glad that I had this unforgettable experience.
那里有我们一起经历过的难忘的事情。
It has the memorable events we have experienced together.
户外广告可以令人难忘。
Outdoor advertising can be memorable.
“我们很难忘记尴尬的时刻。”多诺霍说。
"It can be very hard to forget embarrassing moments," says Donohue.
