形容词
中文翻译：背部的
同义词：
['dorsal', 'dorsal', "dorsal例句：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。）2. The dorsal fin helps the fish to swim in the water.（背鳍帮助鱼在水中游泳。）"]
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 in the water.
背鳍帮助鱼在水中游泳。
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3. The dorsal fin is also used for communication by some fish species.
一些鱼类通过背鳍进行交流。