[yī huìr]
（很短的時間） a little while
after a while
過了一會兒
rest for a while
歇一會兒
Please wait for a moment.
請等一會兒。
We are off for a while.
我們要離開一會兒。
I stayed for a short while.
我待了短短一會兒。
I'll be coming in a moment.
我一會兒就來。
Her moods were very changeable, now laughing loudly, and now sunk in despair.
她的情緒變化無常，一會兒放聲大笑，一會兒陷于絕望。
He says one thing one moment and another thing the next.
他一會兒這么說，一會兒那么說。