鲨鱼的种类有很多，而经常被载攻击人的只有四种 – 牛鲨（学名白真鲨）、虎鲨（学名居氏鼬鲨）、大白鲨（学名噬人鲨）、白鳍鲨（学名灰三齿鲨）
While there are numerous types of sharks, only four are most frequently cited in encounters with humans—the bull shark, the tiger shark, the great white shark and the oceanic white tip shark.
仓鼠有一对不竭生长的门牙，三对臼齿，齿型为：1 0 0 3，成交错摆列的三棱体。
Hamster has a pair of continuously growing incisors, three molar, tooth type : 1003, into a staggered triangular body.
本发明技术方案是这样完成的，收割机上的弹齿，它包括有弹齿，弹齿为三角状。
Because an opening elastic tooth is changed into the triangle elastic tooth, the elastic tooth on a harvester satisfies the needs of corns of which the harvesting chaffs are thick.
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