名词
中文翻译：Unknown
同义词：
['C9 Metric Index', 'C9 Metric Index Measurement']
例句：
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1. The C9 index is used to measure the performance of a company's financial statements.
C9指数用于衡量公司财务报表的业绩。
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2. The C9 index has been shown to be an effective tool for evaluating the health of the economy.
C9指数已被证明是评估经济健康状况的有效工具。
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3. The C9 index is calculated by comparing the value of different industries in a given year with the previous year'sindex.
C9指数是通过比较某一年不同行业的价值与前一年指数来计算的。