I was in Shenzhen, China, and a family stopped me and my wife and asked us (my friend interpreted) if they could have their children take a photo with us.
2
因为我有个朋友,开书店的,正在编一种百科词典,您有能力的话,可以为它翻译一些德语或英语的资料。
Because one of my friends, a publisher, is getting up a sort of an encyclopaedia, for which you might have translated English or German articles.
3
他为我做翻译和研究工作,我们持有良好的朋友关系。
He later did translating and research work for me, and we have remained friends.