她家里条件不好，付不起这次手术费。
She couldn't afford the operation because her family was poor.
信用证(L/C---lettle of credit)是一种有条件的银行付款承诺，承担第一付款责任，是一种银行信用，代替买卖双方负责付款和提交单据，对进出口双方（特别是彼此不熟悉的客户）的利益较有保障。
In L/C transaction, the banker is responsible to pay money and tender documents on behalf of both parties.
如果你知道如何包装定价和支付条件，你将能够比消费者市场更经常地劝服企业市场付高价。
The business market can be convinced to pay premium prices more often than the consumer market if you know how to structure your pricing and payment terms well.
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