There is no eternal rainy season, only long-lost sunny days.

Nothing lasts forever, just like the rainy season, which will eventually pass. Cherish beautiful moments, which are often short and rare.

There is no eternal rainy season, that is to say, nothing is eternal, just like the rainy season, it will pass eventually. Only a long-lost sunny day means cherishing the good times now, which are often short and rare.

Sunny day is a word to describe a kind of weather, which means bright spring.