dense area

例句：

1. 1. The forest was dense withtrees.
   森林里树木茂密。
2. 2. The soilis very dense, making it difficult todig.
   土壤非常密实，很难挖。
3. 3. The dense fogobscured the view of thecity.
   浓雾使城市的景象变得模糊不清。