Large-scale vertical farms, like the "Type O2" design seen here, are still only theoretical, but certain cities have expressed a serious interest in making them a reality.

大规模的纵向农场，比如图示的"Type O2" 设计，仍旧是理论阶段，但一些城市已经表示出将理论变为现实的强烈兴趣。

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Today, in most large cities, water is used only once and then runs to the sea or rivers. But it can be used again.

今天，在有很多的大城市里，使用过的水直接就流到海或河里了。但是，它是可以被再利用的。

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As the businessman association, the Chambers of commerce were not only set up in large and medium sized cities everywhere, but began to breed in country towns.

作为近代商人社团的商会，不仅在各大中城市普遍创建，而且在乡村市镇也广泛渗透。

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Paul Barter of the Sustainable Transport Action Network, in Kuala Lumpur, points out that in Asia only a handful of large cities, such as Tokyo, Singapore, Hong Kong and (at least until a couple of years ago) Seoul, have succeeded in containing congestion.

ECONOMIST: A survey of commuting

The February sales price of newly constructed residential buildings in 70 large and medium-sized cities decreased in only 8 cities remained stable in 6 cities comparing with the previous month.

FORBES: China Real Estate Bubble (Very) Slowly Deflating