在雨中跑步的这种情况下,你可以再次使用平行六面体来理解。所以在一段特定时间内,相同的雨量将会从上方淋到你身上,不管你移动的多快。而在一段特定距离内,你会从侧边淋到相同的雨量–同样的,不管你移动的多快。
So your total wetness is equal to the wetness per second for rain from the top times the amount of time you spend in the rain, plus the wetness per meter for rain from the side times the number of meters you travel. So to stay driest getting from one point to another, you should try to minimize the amount of water falling on to you from above. And quite simply, that means getting out of the rain as fast as possible.
所以你总共的淋湿程度等于每秒从顶端来的雨水造成之淋湿程度乘上你在雨中的时间,加上每公尺从侧边来的雨水造成之淋湿程度乘上你移动的公尺数。所以若要从一地到另一地时保持最为干爽,你应该试着减少从上方落到身上的水量。而很简单的,那意味着要尽快离开雨中。
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