你认为他们旅行中最难忘的时刻是什么？

What do you think was the most memorable moment of their trip?

初恋通常是最难忘的。

First love is usually the most unforgettable.

旅行的第八天是最难忘的。

The eighth day of the trip was the most memorable.

旅行的第五天是最难忘的。

The fifth day of the trip was the most memorable.

生活中简单的快乐往往是最难忘的。

The simple joys of life are often the most memorable.

这次航次是他一生中最难忘的经历之一。

This voyage is one of the most unforgettable experiences of his life.

这次邮轮旅行是我一生中最难忘的经历之一。

This cruise trip is one of the most memorable experiences of my life.

这次旅行是我人生中最难忘的经历其中之一。

This trip is one of the most memorable experiences of my life.

这是旅行中最难忘的部分。

It was the most memorable part of the trip.

我们此行最难忘的部分是参观了魁北克历史名城。

The most memorable part of our trip was a visit to historic Quebec City.