名词
中文翻译：蜗牛形状的星云同义词
同义词：
['snail-shaped cloud', 'snail-shaped gaseous nebula']
例句：
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1. The snail-shaped nebula is a fascinating object in the night sky.
这个蜗牛形状的星云是夜空中一个令人着迷的对象。
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2. Scientists have been studying the snail-shaped nebula for decades.
科学家们已经研究这个蜗牛形状的星云几十年了。
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3. The snail-shaped nebula is believed to be a remnant of a distant star.
这个蜗牛形状的星云被认为是一颗遥远恒星的遗迹。