triangular soil classification chart

例句：

1. 1. The triangularroof of the house is very distinctive.
   房子的三角形屋顶非常独特。
2. 2. Thetriangular shape of theisland makes it difficult to navigate.
   岛屿的三角形形状使得航行变得困难。
3. 3. The triangular piece of paper isa key to the puzzle.
   这张三角形的纸片是解开谜题的关键。