duty没有动词形式复数 dutiesIt is my duty to report the situation to the company.我把这个情况上报给公司是我的责任。

2She's not on duty today. I'll take her place.她今天没有在班，由我来代替处理她的事务。

3One of the essential activities for traveling abroad is shopping in duty-free shops.出国旅游必不可少的一个活动就是去免税店购物