Many salespeople can talk with anyone and convince him or her to buy something. They have a natural ability to sell. They must however apply some hard work to this skill. They must learn a lot about their customers, about the product they are selling, and about the market, they must put some effort 的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

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许多推销员能与任何人谈话和说服他或她买某事。他们有一种天生能力卖。然而他们必须应用一些坚苦工作于这个技巧。他们必须得知很多他们的顾客，关于产品他们卖，并且关于市场，他们必须付出一些努力陪销售一起去的日常文书工作。如果他们不进行到底，销售不会被做。