这件事是我最难忘的一件事。

This thing is I am the most memorable thing.

youdao

去年暑假，我去学游泳，那是很难忘也很有趣的一件事。

Last summer holiday, I learned to swim. It was very unforgettable and interesting.

youdao

我最难忘的一件事是学习游泳。

One of the most impressive things is the study of swimming.

youdao

我最难忘的一件事是学习游泳。

One of the most impressive things is the study of swimming.

youdao