五十多年来，欧洲没有见过这种非洲昆虫。
This African insect had not been seen in Europe for more than 50 years.
估计有超过一千万人的生活受到东非这次五十多年来最严重的干旱影响。
An estimated 10 million people have been affected in East Africa by the worst drought in more than half a century.
沃纳太太捐赠的数额虽然不等，但她五十多年来一直忠诚地向基金会捐赠。
The amounts varied, but for more than 50 years, Mrs. Werner contributed faithfully to the fund.
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