European peasants would insert a wooden drill in a round hole and rotate it briskly between their palms 欧洲的农夫将一个木钻子放入一个圆孔并用手掌不停旋转它。
He discovered that all grassland squirrels made straight for the trees when pursued , and only chose holes in the ground , or hollow logs , as a last resort 他发现,所有的草地松鼠当被追捕时,首选都是直爬上树,实在没有办法时才选择地洞或中空的木钻。