名词
中文翻译：锯齿状的鳍
同义词：
['serrated fins', 'serratededges']
例句：
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1. The fishhad a serrated fin that helpedit to swim quickly through the water.
这条鱼有锯齿状的鳍，帮助它在水中快速游动。
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2. The shark's sharp teeth were serrated,making it difficult for prey to escape.
鲨鱼的牙齿锋利且锯齿状，使得猎物难以逃脱。
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3. Thescientist observed the fish's serrated fin asit swam by.
科学家观察着这条鱼的锯齿状鳍在水里游过。