Selachii这个词语来源于拉丁语，意为鲨鱼目。在生物学中，Selachii指鲨鱼类动物，包括鲨鱼、鳐鱼、魟鱼等。该词语在英文中也常被翻译为Selachians。
以下是9个含有Selachii的例句：
1. The Selachii are a diverse group of cartilaginous fish that inhabit the oceans worldwide. （Selachii是生活在世界各大洋的多样化的软骨鱼类。）
2. Some Selachii, such as the great white shark, are apex predators and sit at the top of the food chain.（一些Selachii，如大白鲨，是食物链的顶端捕食者。）
3. Selachii are often hunted for their fins, which are considered a delicacy in some cultures.（Selachii经常因其鳍被捕猎，这些鳍在一些文化中被视为佳肴。）
4. The Selachii have been evolving for over 400 million years and have adapted to a wide range of environments.（Selachii已经演化了超过4亿年，并适应了各种环境。）
5. The Selachii have a unique organ called the ampullae of Lorenzini, which enables them to detect electrical currents in the water.（Selachii有一个独特的器官叫做Lorenzini小管，使它们能够检测水中的电流。）
6. Sharks are the most well-known members of the Selachii.（鲨鱼是Selachii中最知名的成员。）
7. Selachii are a vital part of marine ecosystems and play an important role in maintaining balance in the oceans.（Selachii是海洋生态系统中至关重要的一部分，并在维护海洋平衡方面扮演着重要的角色。）
8. Selachii are characterized by their streamlined bodies, multiple rows of sharp teeth, and cartilaginous skeletons.（Selachii以其流线型的身体、多排锋利的牙齿和软骨骨骼为特征。）
9. The Selachii are a fascinating group of animals that continue to capture the imagination of scientists and the public alike.（Selachii是一组迷人的动物，继续引起科学家和公众的想象力。）
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