For the longest time, doctors suspected that the condition was caused by persistent, hidden bacterial infections and sometimes prescribed long-term or open-ended antibiotic therapy.
The men in the long-term group took the supplements for an average of 18 years. The men in the short-term group did so for an average of a year, with the longest being three years.
长期组的人服用补充剂平均18年，短期组的人从现在才开始服用，平均才一年，最长是三年。
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Why: Described as "the longest rammed earth wall in Australia," the 750-foot long structure was built to provide short-term accommodations for a cattle station during mustering season.