It takes two days by foot or mule to get to the bottom of the Grand canyon and back, and at least two weeks to complete the journey through the canyon by raft.
它需要两天的步行或骡子到达大峡谷的底部和背部，用木筏至少两个星期才能完成穿越大峡谷的旅程。
A few days later, the farmer's mother-in-law was killed when his mule kicked her.
几天后，农夫的丈母娘被骡子踢到而伤重不治。
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