ephemerae

例句：

1. 1. The ephemeral beauty of the sunset is truly mesmerizing.
   夕阳的短暂之美真是令人着迷。
2. 2. The ephemerae of life are often overlooked in our busy lives.
   生命的短暂往往在我们的忙碌生活中被忽视。
3. 3.The ephemerae of youth are often celebrated with great enthusiasm.
   青春的短暂常以极大的热情被庆祝。