ephemerality

樱花的美在于它的短暂易逝。

The beauty of cherry blossoms lies in their ___ephemerality.

樱花的美丽在于它的短暂，这种转瞬即逝的特质让人更加珍惜。

The beauty of cherry blossoms lies in their ___ephemerality, making people cherish them even more.