After scientists showed the four crows a series of colour photographs of humans with their hair concealed, one pair was trained to pick men's faces and the other pair women's faces.
研究人员给四只乌鸦观看人的一组彩色照片，但把头发隐藏起来，训练一对乌鸦挑选男人照片，另一对乌鸦去选女人照片。
After scientists showed the four crows a series of colour photographs of humans with their hair concealed, one pair was trained to pick men's faces and the other pair women's faces.
研究人员给四只乌鸦观看人的一组彩色照片，但把头发隐藏起来，训练一对乌鸦挑选男人照片，另一对乌鸦去选女人照片。
应用推荐