例句：
It makes our life fragile, ephemeral, and as a result of that, more precious.
它讓我們的生命脆弱，短暫，因此而更珍貴。
But all kinds of fame are ephemeral.
但是，各種名望都是短暫的。
The Pleistocene Epoch was an ice age.
更新世是一段冰河時代。
It was meant to sound like an epoch-making declaration.
有意讓它聽起來像是一個劃時代的宣言。