名词
中文翻译：负指数
同义词：
['negative number', 'negative index value例句：1. The negative index is used to indicate the number of items that are less than zero.（负指数用于指示小于零的项的数量。）']
例句：
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1. The negative index is used to indicate the number of items that are less than zero.
负指数用于指示小于零的项的数量。
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2.The negative index is a useful tool for measuring the performance of a system.
负指数是衡量系统性能的一个有用的工具。
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3. The negative index can be used to calculate the total number of items in a collection.
负指数可以用来计算集合中项目的总数量。