We visited the Grand Canyon and took a trip down to the bottom of the canyon by pack mule .

我们当时去大峡谷旅游，各骑一条驮骡行走在峡谷底部。

youdao

I remember wondering how anyone could enjoy traveling when they had to cart around their stuff like a pack mule.

我想当人们不得不像骡子似的围着行李打转，有多少人会觉得他们的旅行是个享受呢。

youdao

A robot may consist of one arm that can spot weld automobile frames; or it might be a pack mule that can carry heavy gear over difficult terrain. 4.

机器人可能只有一只点焊手机框架的手；或者可能是一头在复杂地形中托运东西的电驴。

youdao

Well one of those poor souls must have grown up to become a product designer bent on saving future generations from such cruel torture, and the result is a portable "bonfire" that you can fold up and slip into a knapsack or strap onto your pack mule.

ENGADGET: Bonfire, the Tripod Burner: all the fun of a cookout with none of the work