But the traditional exchange model has been difficult to meet the needs of the modern second-hand exchange.

但是传统交易模式已经难以适应现代二手物品交易的需要。

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According to a survey by giant Alibaba in 2018, the market for the second hand book was booming last year as more Chinese tend to trade or exchange their used books online.

根据巨头阿里巴巴2018年的一项调查，二手书市场在去年蓬勃发展，因为越来越多的中国人倾向于在网上交易或交换他们的二手书。

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So when one monkey was handed a grape in exchange for her token, the second was reluctant to hand hers over for a mere piece of cucumber.

因此，当一只猴子用一颗葡萄来换回她的一个筹码时，另一只猴子不愿意用一颗葡萄换回一片黄瓜。

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In 1963, at the age of forty-six, he made up for it by setting up his own informal school in a London railway station, teaching half a dozen teenagers in exchange for a little tobacco or a second-hand art book.

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