观察出可以通过移动而不旋转其它的三角形覆盖住其中的任意一个三角形。

You observe that you can cover any of these triangles by moving the other triangles without rotating.

youdao

观察出可以通过移动而不旋转其它的三角形覆盖住其中的任意一个三角形。

You observe that you can cover any of these triangles by moving the other triangles without rotating.

youdao