ephemerals

They occur as seasonally water-filled depressions with a thin layer of soil, and are mainly inhabited by ephemerals and cryptogams.

它们出现在季节性雨后的低洼地带，主要生活着短命植物和隐花植物。

In 1997, our English club has been set up. But for many reasons, it has been the ephemerals and didn't last for long.

早在1997年，我们的英语俱乐部就成立了，但是由于各种原因，没能维持多久。