名词
中文翻译：邮寄成本
同义词：
['postage', 'shipping cost']
例句：
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1.The company's mailing costs have increased significantly due to the increase in postal rates.
由于邮资上涨，公司的邮寄成本显著增加。
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2. Shipping costs are a major expense for businesses that rely on international trade.
对于依赖国际贸易的企业来说，运输成本是一个重要的开支。
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3. The government is considering raising the postage rate to help offset the rising costs of living.
政府正在考虑提高邮资费率，以帮助抵消生活成本的上涨。