难以忘怀

The ship’s crew will spare no pains to make your Mediterranean cruise unforgettable.

全将尽其所能让你们的地中海之行难以忘怀。

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。

Their summer holiday at the seaside is the high spot of the year for the family.

在海滨过暑假是他们一家人今年中最难以忘怀的愉快时刻。