After Walter in Croatia, and Elvira and Frank in Serbia, they were the fourth and fifth members of the species that I have bumped into already during my travels.

• 我在克罗地亚遇到了瓦尔特、在塞尔维亚遇到了艾尔韦拉和法兰克，而现在这两位是我旅途中遇到的第四和第五位了。