a dense forest的用法和样例：
- On the night of a boy's thirteenth birthday, he was placed in a dense forest to spend the entire night alone.
- In this place there were undulating hills and a dense forest here and there.From the Eastern-Han on, it was always a sparsely populated area.
- Viewing a dense forest from a hill full of critters, frill, haze, fog, mountains in the distance, clouds and all that jazz was showing no signs of hurting the framerate.
- Kanas is located in the northern part of Burqin County, 150 km from the county seat is located in a dense forest in the mountains of Altai mountains and lakes.
- Traffic was interrupted by a dense fog.