The book has a diagonal black stripe on the cover.书的封面上有条连接对角的黑斜线.Footsteps had scored a diagonal path through the snow.脚印在雪地上留下了一条对角线.Draw a diagonal line to divide the square into two triangles.画一条对角线,把正方形分成两个三角形....

diagonals的音标：...