The reason for the change is that now there are dozens of companies across the country buying discarded plastic soda bottles and turning them into fenceposts, paintbrushes, etc.
这一变化的起因是，现在全国有几十家公司购买废弃的塑料汽水瓶，并把它们制成栅栏桩、油漆刷等。
2
The fenceposts were fixed firmly in the ground.
栅栏的立柱牢牢地固定在地上。
3
Differences in the height of the fenceposts add interest to an otherwise monotonic rhythm.