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.
在接收国家地理频道的《探索新闻》栏目采访时，他说：“当然，这很像一个灰岩坑，好比鲨鱼也很像鱼类。”
As he told Discovery News (and National Geographic), "Sure, it looks a lot like a sinkhole."
水产动物下脚料如皮、骨、鳍等含丰富的胶原蛋白。本文研究了灰星鲨鱼皮、骨胶原蛋白的提取及纯化方法。
A large amount of collagen exists in the wastes of aquatic animals such as in fish skin, bone and fin.
水产动物下脚料如皮、骨、鳍等含丰富的胶原蛋白。本文研究了灰星鲨鱼皮、骨胶原蛋白的提取及纯化方法。
A large amount of collagen exists in the wastes of aquatic animals such as in fish skin, bone and fin.
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