形容词
中文翻译：单一的
同义词：
['solitary', 'solitaire']
例句：
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1. Thesingle tree in the park is a symbolof hope.
公园里那棵孤独的树是希望的象征。
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2. She has only onefriend, and they are very close.
她只有一个朋友，他们非常亲密。
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3. He prefers to live alone rather than with others.
他宁愿独自生活也不愿与他人共处。