我第一次遇到他是在去北京的火车上.(It was .) it was on the train to Beijing where i first met him.
So here we are，on the train to BJ. 分析：句子中有部分倒装同位语So we are here，on the train to BJ.on the train to BJ.是做here的同位语，和here做的是地点状语，并不是什么从句.
英语翻译 1.In this journey from Beijing on the train bound for Shenzhen，we have encountered an American，I cousin on work in his company.2.The singer on the street heard a lot of fans singing his latest song.3.
