"Circle" 的发音有两种：1. 英式 ['sɜːkl] 2. 美式 ['sɜːrkl]。
作为名词，它可以指：圆圈；圈子；包厢。
作为动词，它意味着：划圈；包围；盘旋；环绕。
记忆提示：将 "circle" 拆分为 "cir"（圆）和 "cle"（扣儿），联想到有颜色的扣儿通常是圆形的。
以下是关于 "circle" 的常见句型：
1. 用作名词 (n.)
1) She first drew a circle on the board.
2) The house lay in a circle of trees.
3) Listen to the four choices, and then draw a circle under the right one.
2. 用作不及物动词 S+～(+A)
1) They saw the birds were circling again.
2) A number of planes were circling overhead.
3) Rumors circled through the town.
3. 用作及物动词 S+～+ n./pron.
1) The plane circled the airport before landing.
2) The teacher circles the pupil's spelling mistakes in red ink.
3) The moon circles the earth.
