concrete jungle

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Stands at the window, can not help but surprise, out of the window across such concrete jungle, canyon, where floated from flower scent!
伫立于窗前，不禁惊讶，窗外满眼都是水泥森林峡谷，何处飘然而来的花香味！
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The message was clear: the good stuff was outside of our neck of the concrete jungle. The direction to go was outward, away from Brownsville.
事实很明显：好东西并不在我们身处的这些钢筋水泥丛林之中，唯一的方向就是走出去，离开布朗斯威尔。
The cramped, concrete jungle that is Tokyo, one of the world's most densely populated cities, has little space for parks. But things are starting to look up.
东京被称为拥挤的“钢筋水泥丛林”，也是世界上人口密度最大的城市之一，在这里几乎没有空间来修建公园，但如今情况却有所改观。

You have probably heard the term "concrete jungle."
They included Nneka, who came from Nigeria to promote her new CD, "Concrete Jungle."
featuring the track "Concrete Jungle." entered the Grammy Hall of Fame.

Lady Liberty towers in her green bronze toga over the concrete jungle and waterways.
FORBES: Meryl Streep, Female Symbols and The National Women's History Museum

an ugly grey area of a city where people live in closely crowded apartment buildings and there is little space and no trees or grass

If you refer to a city or area as a concrete jungle, you mean that it has a lot of modern buildings without grass or trees, and you think it is ugly or unpleasant to live in.