在人口稠密的城市周围地区，例如河内——每平方公里达到将近2000人，无论钻入多深的地下水，都很难得到不受砷污染的水源。
In the region surrounding the densely populated city of Hanoi — with nearly 2,000 people per square kilometre — it is difficult to escape arsenic-contaminated water, no matter how deeply you drill.
在人口稠密的城市周围地区，例如河内——每平方公里达到将近2000人，无论钻入多深的地下水，都很难得到不受砷污染的水源。
In the region surrounding the densely populated city of Hanoi — with nearly 2, 000 people per square kilometre — it is difficult to escape arsenic-contaminated water, no matter how deeply you drill.
今天，无论在曼谷、北京还是柏林，这些世界上人口最稠密的城市的道路上都积满了机动车，其数量比历史上任何时候都要多。
Today, whether in Bangkok, Beijing or Berlin, the roads of the world's most populous urban areas are flooded with more motor vehicles than at any other time in history.
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