大学城的学生可能还有另一种参与进阶数学的手段：数学圈。

Students in university towns may also have access to another lever for involvement in accelerated math: math circles.

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对于数学家而言，一把椅子相当于一个苹果；一个杯子——至少是有把手的——就像一个油炸圈饼。

To mathematicians, a chair is equivalent to an apple; a mug—at least, one with a handle—is like a doughnut.

youdao

对于数学家而言，一把椅子就相当于一个苹果，一个带柄的杯子就像一个油炸圈饼。

To mathematicians, a chair is equivalent to an apple; a mug-at least, one with a handle-is like a doughnut.

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