dunce caps

1. 1.

   A conical hat that a school pupil is forced to wear to indicate that the person is a dunce.

   圆锥形帽子,学生被罚戴以示其愚笨

2. 2.

   The topological space obtained by identifying the sides comprising the boundary of a triangle, two sides with consistent orientation and the third with the reverse orientation.

   一种拓扑空间,将三角形边界的两条边同向识别、第三条边反向识别得到

一种拓扑空间,将三角形边界的两条边同向识别、第三条边反向识别得到；以前的学生被罚时所戴的纸帽

Connections

Learner notes