名词
中文翻译：后鳍
同义词：
['hinge', 'tail fins例句：1. The fish swims with its rear fin extended.（这条鱼用它的后鳍游动。）2. The shark has sharp rear fin teeth to help it catch prey.（鲨鱼有锋利的后鳍牙齿来帮助它捕捉猎物。）']
例句：
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1. The fish swims with its rear fin extended.
这条鱼用它的后鳍游动。
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2. The shark has sharp rear fin teeth to help it catch prey.
鲨鱼有锋利的后鳍牙齿来帮助它捕捉猎物。
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3. The dolphin has a long, streamlined body and powerful tail fins for propulsion.
海豚有一个流线型的身体和强大的尾鳍用于推进。