edge defined film-fed growth

例句：

1. 1. The car is parked at the edge of the road.
   汽车停在路的边缘。
2. 2. The book has a spine that is just at the edge of the cover.
   这本书的封面边缘刚好是书脊。
3. 3. The mountain had an edge that was barely visible from the top.
   这座山的边缘从山顶几乎不可见。