形容词
中文翻译：稀少的
同义词：
['scarce', 'infrequent', 'uncommon']
例句：
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1. The rare species of bird is found only in the mountainous regions.
这种稀有的鸟类仅在山区发现。
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2. The rare opportunity to travel abroad has been a dream for many.
出国旅行的难得机会一直是许多人的梦想。
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3. The rare gemstone was discovered in a remote part of the world.
这种罕见的宝石石是在世界的某个偏远地区发现的。