自問自答
http://jeff.dean.home.att.net/swisher.htm
在這個網址
有一段寫到
"If you ride with a shorty or half helmet, you are accepting only 39% of the
protection you could obtain. You are literally throwing away 61% of the
protection you would have had had you chosen a full-face helmet."
所以第一行的"shorty"指那些瓜皮帽 對嗎?
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