Take that circle and put it on your cheek.

把这个圆圈放在面颊上。

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open your textbook and put a circle around question number one.

打开你的课本，在第一个问题上画一个圈。

Would you please 实战 - SpeakingMax英语口语达人

Maybe you'll put a little T and circle it.

也许你要标注一个带圈的 T

耶鲁公开课 - 基础物理课程节选