The crystals in human teeth have a special arrangement and they are 'glued together' by proteins. Therefore the overall strength of human teeth is on par with that of the shark's. 据英国国家通讯社报道,研究表明,虽然人类的牙齿在数量和大小方面不能与虎鲨的相提并论,但其坚硬度却能与虎鲨媲美。
Shark Teeth as Hard as Human Teeth | Dentistry Todaysiteground
shagreen patch. s. of teeth SYN: enamel cuticle. thick s. s. from the palms and soles, so named because of its relatively thick epidermis. thin s. s. from areas of the body other than the palms and soles, so named because of its relatively thin epidermis. toad s. SYN: phrynoderma...
a有很多的鱼,像是鲨鱼鲸鱼海马等等 Has very many fish, is likely shark whale seahorse and so on [translate] a我爷爷前天去医院把他的两颗坏牙拔了 My grandfather day before yesterday went to the hospital to pull out his two bad teeth [translate] a越早从电脑游戏出来越好 Comes out more early...
The Mobians use the knowledge they learned in the last ice age. Their already-existing underground cities allow them to survive the ice age rather well. 1,770,000 Temperatures reach their lowest peak, and Fedeledi start living underground, opening steam vents so that the underground cities don...
Therefore the overall strength of human teeth is on par with that of the shark's. 据英国国家通讯社报道,研究表明,虽然人类的牙齿在数量和大小方面不能与虎鲨的相提并论,但其坚硬度却能与虎鲨媲美。 在对人类和鲨鱼牙齿的微结构进行对比后,科学家惊奇地发现,作为海洋头号捕食者的鲨鱼,虽然其牙齿表面覆盖有...
Shark Teeth as Hard as Human TeethDentistry TodayDentistry Today
The equilibrium condition with respect to the time density of each animal is obtained from (24) in [8]; they found that in the housing zone, the time density of carnivores first continuously increases, then decreases as it approaches the CBD before finally reaching zero. In short, the ...