Initially, it would run for one year as a trial period. If everything is satisfactory, it could be renewed and extended two years.
刚开始是一年，作为实验期，如果令人满意，合同可以重订，而且延长两年。
After successful completion of the run-in period, 8,171 of the women were randomly assigned to the antioxidant arms of the trial.
在成功完成非正式调查阶段后，又随机安排其中的8,171人进行抗氧化剂实验。
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