crowfoot crack

例句：

1. 1. The crowfoot crack in the rock is a telltale sign of impending collapse.
   岩石中的牛膝草裂口是即将坍塌的明显迹象。
2. 2. The farmer carefully inspected the crowfoot cracks in the fence before deciding to repair it.
   农民仔细检查了围栏上的牛膝草裂口，然后决定修复它。
3. 3.The crowfoot cracks on the roof are a concern for the homeowner.
   屋顶上的牛膝草裂口是房主的担忧。