Many scholars consider the changes of Engel 's coefficient as an important quota of sports consumption demand.

许多学者把恩格尔系数的变化，看成是体育消费需求的重要指标。

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Many scholars consider the changes of Engel 's coefficient as an important quota of sports consumption demand.

许多学者把恩格尔系数的变化，看成是体育消费需求的重要指标。

youdao