顷刻间

A network of ripples quivered momentarily across the surface of the still pool.

顷刻间平静池水面上轻轻地泛起层涟漪。

In a moment,the side of clouds just like sunflower became as flat and unfolded as stithy,the clouds layer were also showing its shady true colors.

顷刻间，葵花状云边变得像样平展，云层露出了阴暗。