名词
中文翻译：Unknown
同义词：
['main amount', 'principal sum', 'principal value']
例句：
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1. The company's main amount of profits is from its software sales.
该公司的主要利润来自软件销售。
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2. The principal amount of the loan is $50,000.
贷款的本金是50,000美元。
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3. The principal amount of the investment was $1 million.
投资的本金是100万美元。