名词
中文翻译：Unknown
同义词：
['solitary', 'solitary', 'single', 'individual', 'singular', 'unique', 'isolated', 'alone', 'standalone']
例句：
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1. The univallate plant is a rare species that can only be found in the rainforest.
这种单核植物是稀有物种，只能在雨林中找到。
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2. He was solitary and reserved, rarely speaking to anyone.
他孤僻且寡言，很少与人交谈。
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3. The standalone structure of the building stood out against the skyline.
这座建筑的独立结构在天际线上格外显眼。