名词
中文翻译：双垂直鳍
同义词：
['dual vertical fins', 'twinfins']
例句：
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1. Thefish swims with its twin vertical fins.
这条鱼用它的双垂直鳍游动。
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2. The dolphin has two pairsof twin vertical fins.
这只海豚有两对双垂直鳍。
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3. The sharkuses its twin vertical fins to hunt for prey.
鲨鱼使用它的双垂直鳍来捕食猎物。