深山密林 meaning in Chinese

dense forests in the deep mountains; hilly areas with forests; deep mountains and forests

For nearly a decade they had been building a road through the forbidding mountains and jungles bordering the two countries .
近十年来他们在两国边界附近穿过深山密林修筑一条公路。
The picturesque xishuang banna , surrounded by green mountains covered with sub - tropical trees and vegetation , is located in a large flat valley bordering on the lantsang river
美丽如画的西双版纳位于平坦的澜沧江河谷地带，四周是亚热带的深山密林。