题目内容：

We were _held up_ for half an hour in the traffic and so we arrived late.怎么理解这题?

优质解答

hold up 困住了的意思
整句话的意思是
我们被交通困住了半个小时,所以我们迟到了

追问：

从语法上怎样理解？

追答：

we主语 were held up被动式谓语 for half an hour 时间状语 in the traffic地点状语 and, so 都是连接词，必须只取其一，删掉and we 主语 arrived谓语 late状语