演出结束后，观众在剧院门口徘徊。

After the show, the audience was ___milling around the theater entrance.

面粉是由小麦经过精细磨制而成的。

Flour is produced by ___milling wheat into a fine powder.

学生们在操场上转悠，等待运动会开始。

Students were ___milling around the playground, waiting for the sports meet to begin.