名词
中文翻译：背部的
同义词：
['dorsal region', 'dorsal side']
例句：
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1.The dorsal fin is used to sense the water's temperature.
背鳍用于感知水温。
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2. The dorsal fin of a shark is very sensitive.
鲨鱼的背鳍非常敏感。
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3. The dorsal fin of the fish was broken off during the fight.
鱼在战斗中被击断了尾巴。