unforgettable

1. ADJ If you describe something as unforgettable, you mean that it is, for example, extremely beautiful, enjoyable, or unusual, so that you remember it for a long time. You can also refer to extremely unpleasant things as unforgettable. 令人难忘的

A visit to the museum is an unforgettable experience. 对该博物馆的参观是一次难忘的经历。

...the outdoor activities that will make your holiday unforgettable. …将使你的假期难忘的户外活动。