Then he turned to his guest. This job keeps a fellow on the jump! he exclaimed.

之后他回到了客人身边，他大叫道，这份工作让人们神经紧张。

The men rode and ran by turn, and the dogs were kept on the jump, with but infrequent stoppages.

那两个人轮流驾橇和跑路, 狗队则一直在奔跑, 有时停脚歇一会儿。