哪个12岁男孩会想要山地摩托车?。
常规的看法是山地摩托车手更危险，但我并不同意。
Conventional wisdom has it that mountain biking is far more dangerous, but I disagree.
作为喜欢冒险的摩托车手，我关注两个严肃的社区：山地摩托车手和公路摩托车手。
As an avid cyclist, I'm aware of two serious communities: mountain bikers and road bikers.
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