这些流浪者从一个城市游荡到另一个城市，寻找临时工作。

These ___roamers drift from city to city, looking for temporary jobs.

研究人员正在观察非洲草原上的漫游动物，如大象和斑马。

Researchers are observing the African savanna ___roamers, such as elephants and zebras.

这款手机套餐特别适合经常出差的国际漫游用户。

This phone plan is ideal for frequent international ___roamers.