名词短语
中文翻译：紧密分类
同义词：
['Closely classified', 'Closely categorized例句：1. The researchers have conducted a close classification of the species.（研究人员已经对这一物种进行了紧密分类。）']
例句：
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1. The researchers have conducted a close classification of the species.
研究人员已经对这一物种进行了紧密分类。
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2.The new taxonomy is designed to closely classify the species.
新的分类系统旨在对物种进行紧密分类。
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3. The classification of the species has been closely tied to their geographical distribution.
物种的分类与其地理分布紧密相关。