in a while

• 一会儿，不久；一段时间

in a while的用法和样例：

例句

1. She looked in on us [at our office]once in a while.
   每隔些时候，她都到我们这儿[办公室]来一趟。
2. Once in a while he goes with us to the movies on Saturday night.
   偶尔在星期六晚上他同我们一道去看电影。
3. Once in a while we go to a restaurant but usually we eat at home.
   我们偶尔下馆子--但一般都在家吃。
4. While reading he looked out of the window once in a while.
   他正在读书，有时还朝窗外看看。