On the Stock Exchange, aggressive buying propped the market up.
在证券交易所，市场在大量买单的推动下有所上扬。
You can exchange these jeans within a week of buying them.
你可以在购入一星期内退换这些牛仔裤。
The choice of buying-selling exchange mechanism is important to the exchange rate.
结售汇制的选择是一国汇率制度的重要内容。
The choice of buying-selling exchange mechanism is important to the exchange rate.
结售汇制的选择是一国汇率制度的重要内容。
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