They look like they cover exactly half of the rectangle, their edges forming one long line running from corner to corner.

它们看起来正好覆盖了矩形的一半，它们的边缘形成一条从一个角到另一个角的长线。

The sod comes curving down to the water's edge, forming bossy outswelling banks, and in some places overlapping countersunk boulders and forming bridges.

草皮向下弯曲到水边， 形成波涛汹涌的堤岸， 在某些地方与埋头的巨石重叠并形成桥梁。