An unforgettable experience has such a strong effect or influence on you that you cannot forget it.
发音
例句
1. The trip had been unforgettable experience for both of us. 那趟旅行是我们两人难以忘怀的经历。 2. He created many unforgettable characters in his novels. 他在他的小说中创造了很多令人难忘的人物。