第一次恋爱常常不成功。

First love affairs have a way of not working out.

《牛津词典》

这是他人生当中第一次恋爱。

This is the first love of his life.

youdao

第一道汤最美味，第一次恋爱最珍贵。

Of soup of love , the first is the best .

youdao