仅仅在几十年前，这个天然温泉还是纯粹的蓝色。

Just a few decades ago, the natural hot spring was a distinctive blue colour.

youdao

仅仅在几十年前，这个天然温泉还是纯粹的蓝色。

Just a few decades ago, the natural hot spring was a distinctive blue colour.

youdao