0 a tropical forest in which trees and plants grow very closely together -- 热带丛林
1 an uncontrolled or confusing mass of things -- 乱七八糟的一丛，杂乱的一堆
a jungle of electronic equipment 林林总总的电子设备
2 a situation in which it is difficult to succeed because a lot of people are competing against each other -- 弱肉强食的地方，生存竞争激烈残酷之处
You've got to be determined in this life - it's a jungle out there, kid. 孩子，你必须意志坚定——生活就像弱肉强食的丛林一样。
3 a type of popular dance music with an extremely fast rhythm and a low range of musical notes -- 丛林音乐（一种节奏极快、曲调低的流行舞曲）
He spent a year in the jungle, observing how deforestation is affecting local tribes.
A gravel road leads through the jungle and up into the Andes.
The major difference between these two jungles, however, is the presence or absence of beauty.
The natural and the urban jungles dramatized in these two novels have much in common.
The rent-free lands became unproductive for want of manure after yielding a few crops which made it necessary for them to clear fresh jungles.
