for the duration of sth
+of holiday, war, course在整个期间
I shall be away for the duration of the holiday.我整个假期都会外出度假。
He protected her for the duration of the trial.他在案件审理期间保护她。
of 10 weeks'/months'/years' duration为期10周/10个月/10年
Courses are of two years' duration.这些课程为期两年。