形容词
中文翻译：头朝上的
同义词：
['dorsal', 'dorso-ventral例句：1. The baby is lying on its back with its head turned towards the sky.（婴儿仰卧着，头部朝向天空。）']
例句：
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1. The baby is lying on its back with its head turned towards the sky.
婴儿仰卧着，头部朝向天空。
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2.The fish swims in a dorsal fin, which helps it to stay afloat.
鱼用背鳍游动，帮助它保持浮力。
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3.The dorsal fin of the shark is used for propulsion and defense.
鲨鱼的背鳍用于推进和防御。