倏忽的英文：
swiftly

Light reveals the subtle alteration of things, the sly or calamitous impermanence or mortal life
事物的细微变动，人生的狡猾，倏忽无常，一一都在光中显露出来。

To move swiftly;zoom.
快速移动迅速地移动；急遽上升

running swiftly under ice as clear as glass.
在如玻璃透明的冰层下快速的流动。

The Americans and Russians were driving swiftly to a junction on the elbe
美军和俄军正在迅速地向前推进到易北河去会师。

The local people are strongly and swiftly adaptable to changes in their environment.
香港人对於环境的变化，有很强的适应能力，有很快的适应能力。

Large flakes of snow began swiftly to fall.
大片大片的雪花开始簌簌飘落。