The marketplace was jammed with a noisy crowd of buyers and sellers.
集市上熙熙攘攘挤满了买卖东西的人。
《柯林斯高阶英汉双解学习词典》
Trading stocks , on the other hand , is fairly cheap if you use a discount broker.
买卖股票的情况是,如果你选择的是低价经纪商, 那麽交易成本相当低.
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Animals are bought and sold on the basis of their genetics and breeding history.
动物的买卖主要是基于它们的遗传基因和繁衍历史.
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