Like many young people, Jessica wants to travel the globe. Unlike most of them, this 25-year-old is doing it full-time. She and her husband have spent the last two years traveling the world, stopping everywhere from Paris to Singapore. It might sound like one long, expensive vacation, but the couple has an unusual way to make their travel affordable.

上面一段摘自2022年高考英语新全国卷2完形填空。

请问文中的 travel 后面为什么没有介词？

不应该是 travel around the globe 吗？