形容词
中文翻译：背部的
同义词：
['dorsal', 'caudal']
例句：
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1.The dorsal fin is the most important part of the fish's body.
背鳍是鱼身体最重要的部分。
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2. The dorsal fin helps the fish to swim efficiently.
背鳍帮助鱼有效地游泳。
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3.The dorsal fin has been used as a symbol of strength and courage in many cultures.
背鳍在许多文化中被用作力量和勇气的象征。