然而，这一证据还远远不够，因为在过去的十年中，已经建造了大量排放这些污染物的新工业设施。

This evidence is far from adequate, however, since over the last decade a substantial number of new industrial facilities that emit these pollutants have been built.

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那是因为在过去，床常常是装着干草的大袋子。

That's because a bed was often a big bag with hay inside in the past.

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它在中美关系中占有特殊的地位，因为在过去50年里，它有助于两国和睦相处。

It holds a special place in China-US relations, as it has helped both countries get along for the last 50 years.

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