unforgettable

形容词 unforgettable:

1. impossible to forget

1. She sat up late that night to write a detailed account of the unforgettable moment.
   这天夜间，她迟迟没睡，详细地写下这难忘时刻的情景。
2. An unforgettable experience.
   一个不会被遗忘的经验
3. It's an unforgettable experience.
   这是一次难忘的经历。