translation.en: And professor Nathan Hart and his team had just written a paper which tells us, confirms that predatory sharks see in black and white, or grayscale.
translation.zh: 而且南森·哈特跟他的团队 刚刚写了一篇文章， 确定地告诉我们掠夺性鲨鱼 的视野是黑白的，或者不同程度的灰色。