一个戴着防撞头盔的男子正骑上一辆摩托车。

A man in a crash helmet was mounting a motorcycle.

《柯林斯英汉双解大词典》

雄性鹿角蝇也做同样的事情，只不过它们用鹿角互相头撞头——以赶走竞争对手。

Male antler flies do the same, except they use their antlers to head-butt each other—to see off rivals.

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好吧，看这儿，邻居——你撞头彩了！

Well, hey there, neighbor — you're in luck!

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