s. permitting little if any light to pass through because of denseness of matter
s. hard to pass through because of dense growth
s. having high relative density or specific gravity
s. slow to learn or understand; lacking intellectual acuity
a. 密集的, 浓厚的
1. The forest was so dense that we could hardly see the path.
森林非常茂密，以至于我们几乎看不到小路。
2. His dense book requires a lot of time to understand.
他那本内容复杂的书需要花很多时间才能理解。
3. The fog was so dense that we had to drive slowly.
雾非常浓，以至于我们必须慢慢开车。