This is first time the meaning of the headbutt has been clear.

这是第一次弄清楚用头碰撞的含义。

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HONEYBEES headbutt their hive mates to warn them of danger at a food source.

蜜蜂用头碰撞它们的蜂巢伙伴，向它们警告食物源处的危险。

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Along with the headbutt, the signaller makes a brief "piping" sound, says Nieh.

随着用头碰撞，这些通讯兵发出短暂的“尖叫”声，聂说。

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Europe's problems nearly always start with miscommunication: the Ems telegram and the Zidane headbutt being just two examples.

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Previous surveys for the charity have suggested many pupils are bad sports, willing to elbow, headbutt and argue their way to victory.

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"When their heads come in I probably need to duck mine down a bit so they won't headbutt me in the face, " he said.

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