三十年来,你们一直是恩爱夫妻。
过去三十年来,退休年龄人口在劳动力中的比例翻了一番。
The percentage of retirement-age people in the labor force has doubled over the past three decades.
它的后果是:南非持续的干旱——三十年来最严重的干旱——将导致它今年至少四分之一的玉米作物受损。
It has consequences: South Africa's ongoing drought—the worst in three decades—will cost at least a quarter of its corn crop this year.
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