浑浊的水慢慢变得清澈起来。

The muddy water slowly cleared.

《牛津词典》

但是，事实上，北京的空气质量正变得清澈起来。这让人感觉惊讶。

No, the surprise is this: Beijing's air is actually getting cleaner.

youdao

你会看到世界由清晰变模糊的全过程，心会在你泪水落下的那一刻变得清澈明晰。

You will see the whole process of the world is blurred by the clarity, the heart will become clear and clear in the moment your tears fall.

youdao