名词
中文翻译：罕见
同义词：
['rareness', 'infrequency例句：1. The excrescency of the rare species is a cause for concern.（这种稀有物种的罕见性引起了人们的担忧。）2. The infrequency of this event has led to speculation about its causes.（这一事件的罕见性引发了对其原因的猜测。）']
例句：
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1. The excrescency of the rare species is a cause for concern.
这种稀有物种的罕见性引起了人们的担忧。
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2. The infrequency of this event has led to speculation about its causes.
这一事件的罕见性引发了对其原因的猜测。
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3.The excrescency of the rare species is a cause for concern.
这种稀有物种的罕见性引起了人们的担忧。