2 sentences for 一晃 (yī​huǎng — instant)

1. 十年时间一晃就过去了。

   shí nián shí​jiān yī​huǎng jiù guò​qù le.

   Ten years passed in a flash.

   Source: Dong Chinese Dictionary

2. 一晃二十年过去了。

   yī​huǎng èr​shí nián guò​qù le.

   Twenty years have passed in a flash.

   Source: OpenSubtitles