The 20-year risk of cancer death remained lower in the aspirin groups than in the control groups, and benefit increased with scheduled durationoftrial treatment.
在对20年的癌症死亡风险研究中，阿司匹林组比对照组要低，并且效果随实验干预时间的延长而增加。
2
He was given the task of protecting her for the durationof the trial.
他被委以在审判期间保护她的任务。
《柯林斯英汉双解大词典》
3
They have been given protection with their mother for the durationof the trial in the nearby psychiatric clinic where they were treated in the days and months after they were freed.