But mules still perform this work in some roadless areas of the western United States.

但骡子仍然在美国西部些没有道路地区从事项工作。

It's this remarkably wild landscape, one of the largest roadless areas in the Lower 48.

片非荒凉，美国本土 48 州最大无路地区之。

Intagliata: It's true—when I think conservation, I think of roadless stretches of the Sierra Nevada, or remote patches of the Desert Mojave.

Intagliata：真——当我想到保护时，我会想到内华达山脉无路延伸地带，或莫哈韦沙漠偏远地区。