名词
中文翻译：保护边际
同义词：
['safety margin', 'buffer zone']
例句：
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1.The company has a protective margin of 20% on its earnings.
该公司的盈利有20%的保护边际。
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2. The investment bank's balance sheet shows a protective margin of $50 million.
这家投资银行的资产负债表显示，其资产有5000万美元的保护边际。
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3. The new product has a protective margin of 30%, which is higher than the competition.
新产品的保护边际为30%，高于竞争对手。