angle pipe

例句：

1. 1.The angle of the roof is perfect for ventilation.
   屋顶的角度完美，适合通风。
2. 2.The angle of the light was just right to read by.
   光线的角度正好，可以阅读。
3. 3.The angle of the wall is too sharp, it's uncomfortable.
   墙的角度太尖锐了，不舒服。