circle 的意思是圆圈，talk in circles就是说话绕圈子，说话不直截了当，来迷惑听话的人。

【例句】
His lawyer talked in circles trying to confuse the jury.
他的律师绕着圈子说话，试图把陪审团弄糊涂。

Look, we can talk ourselves in circles about charter schools.
听着，我们可以就特许学校的事继续兜圈子。