We meet,we talk about what the hike is for the day, and then they pack their backpacks and we head out the door - no matter what the weather."

VOA: standard.2010.06.25

Soldiers were expected to be able travel thirty kilometers per day, in full pack.

士兵一天可以行进30千米，在全副装备的情况下。

耶鲁公开课 - 新约课程节选