The green, yellow and grey birds are originally from south America but are living wild in the south of England after being released from captivity in the 90s.

这种绿色、黄色和灰色的小鸟最初来自南美洲，但自从20世纪90年代从笼中放生以来就一直生活在英国南部的野外。

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America is in the throes of a grey divorce revolution as married couples over the age of 50 split up in unprecedented Numbers.

随着50岁以上夫妻分道扬镳的数量空前增多，美国正处于“灰发离婚变革”的阵痛中。

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More important, the city offers reliable sunshine and blue skies when much of Europe and America is dark and grey.

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That explains why, among rich countries, Spain, Greece, Italy and Belgium have some of the largest grey economies and why America, Canada and Switzerland have much smaller ones.

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It is worth waving away this fog of dogma that dominates much discussion involving America to consider that, even in a world characterised by realpolitik with its shades of grey, there remain issues in black and white.

ECONOMIST: Letters | The