When people talk about MPH, I always associate with this Utube v

来源: Giantfan 于 2014-10-08 10:57:06 [档案] [旧帖] [给我悄悄话] 阅读数 : (322 bytes)

回答: The ball does not always travel @95mph. A breaking ball 由 Giantfan 于 2014-10-08 09:48:47

You might probably watch it already but this intricate explanation of MPH still makes me chuckle

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