1%的富裕阶层拥有40%的社会资产；而且，这些人口高度集中在美国、欧洲和日本。
The rich are concentrated in the US, Europe and Japan, with the richest 1% alone owning 40% of the world's wealth.
随着城市快速经济的增长及人口的高度集中，城市隧道及地下工程的修建日益迫切。
With rapid growth of urban economy and concentration of population, there is urgent need to construct urban tunnel and underground projects.
城市是在不断演变的人造物体，人类活动赋予城市生命同时，高度集中的人口、工业和建筑物也给城市环境带来了巨大的压力。
City is a artificiality which is changing all The Times. The highly converged population, industry and structure are bringing city great pressure as soon as human activity give the life to city.
城市是在不断演变的人造物体，人类活动赋予城市生命同时，高度集中的人口、工业和建筑物也给城市环境带来了巨大的压力。
City is a artificiality which is changing all The Times. The highly converged population, industry and structure are bringing city great pressure as soon as human activity give the life to city.
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