名词
中文翻译：利润比率
同义词：
['profit margin', 'return on investment', 'profitability']
例句：
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1. The company's profit margin has been declining over the past year.
该公司的利润率在过去一年内一直在下降。
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2. The new product is expected to increase our return on investment.
新产品预计将提高我们的投资回报率。
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3. To improve profitability, we need to focus on cost reduction strategies.
为了提高盈利能力，我们需要专注于成本削减策略。