The soldiers all used to do a six-month tourofduty in Northern Ireland.
士兵过去都要在北爱尔兰服役六个月。
《牛津词典》
2
IDA assigns sailors in the US navy to new jobs when they finish a tourofduty and has to juggle naval policies, job requirements, changing costs and sailors' needs.
We see those same qualities today, particularly in our young men and women in uniform who have served tour after tourofduty to defend our nation in harm’s way, and their civilian counterparts.