名词
中文翻译：长期平均数
同义词：
['average', "long-term average例句：1. The company's long-run average stock price has been declining.（该公司的长期平均股价一直在下降。）2. The economist calculated the long-run average interest rate for the country.（这位经济学家计算了该国的长期平均利率。）"]
例句：
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1. The company's long-run average stock price has been declining.
该公司的长期平均股价一直在下降。
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2. The economist calculated the long-run average interest rate for the country.
这位经济学家计算了该国的长期平均利率。
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3.The long-run average is a measure of how many years it takes to reach a certain level of income.
长期平均是指达到某一收入水平所需的年数。