经过八角形的中心画两条直线，能够得到六个一样的三角形。

Six identical triangles can be formed by drawing two straight lines through an octagon's center point.

youdao

形态各异的窗户点缀在走廊上，有方形，有圆形，有六角形，也有八角形。

Corridors are dotted by Windows of various shapes-square, round, hexagonal and octagonal.

youdao

形态各异的窗户点缀在走廊上，有方形，有圆形，有六角形，也有八角形。

The corridors are decorated by windows of every shape： spuare, round , hexagonal and octagonal.

youdao

I've shown the differences here in terms of shape, these are shaped liked octagons and these are shaped like squares, but if I looked at these cells, what would I find that's really different about them?

我展示了一些细胞形态上的差异,这些细胞是八角形的,这些是方形的,但如果仔细观察这些细胞,我能找到一些本质上的差异吗

耶鲁公开课 - 生物医学工程探索课程节选