名词
中文翻译：交易差额
同义词：
['margin of transaction', 'profit margin', 'trading margin']
例句：
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1.The company's profit margin is declining due to increased competition.
由于竞争加剧，该公司的利润边际正在下降。
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2.With the new regulations, the margin for error has been reduced.
新的规章制度降低了误差的余地。
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3.The trader needs to monitor their transaction margin closely to avoid risk.
交易员需要密切监控其交易差额，以避免风险。