n a journey by ox wagon (especially an organized migration by a group of settlers)
n any long and difficult trip
v journey on foot, especially in the mountains
v make a long and difficult journey
n. 远距离行走 ( trek的名词复数 ); 长途跋涉, 艰难的旅程（尤指在山区）
v. 艰苦跋涉, 徒步旅行( trek的第三人称单数 ); （尤指在山中）远足, 徒步旅行, 游山玩水