NOGAD

例句：

1. 1. He was a nomad, traveling from place to place.
   他是一名游牧民，四处漂泊。
2. 2. The nomadic lifestyle is hard on the body and mind.
   游牧生活对身体和心理都是一种考验。
3. 3. The nomads were forced to leave their homes due to drought conditions.
   由于干旱条件，游牧民被迫离开家园。