Because there is no need to chew blood. the vampire's teeth are actually smaller than those of other bats. Its front incisors are large and razor-sharp, however, enabling it to penetrate the skin of a sleeping animal without it feeling a thing.
由於血液不需咀嚼，它們的牙齒比其他蝙蝠少，但前排牙齒已演化成兩片鋒利的三角刃，可以極精準地割開睡覺的動物皮肉，而不被察覺。