diagonals
n．对角线：从一个多边形的一个顶点到另一个非相邻顶点的线段。
例句
The medium favors hard 90-degree angles, but that shouldn't stop us from including diagonals, zig-zags, and squiggly lines in our designs.
媒体偏爱实线90度角，但那不应当阻止我们在设计中加入斜线、锯齿线和波浪线。
Draw a square, and then cross the two diagonals.
画一个正方形，然后画两条对角线。
Look at the white diagonals and you will see why.
看着白色的对角线你就知道为什么了。
