详细解释

例句

1. I bought it at low price.我以低价将它买下。 2. I bought it at a bargain sale.我在大减价时买了它。 3. to buy it at secondhand买二手货 4. to buy at wholesale整批买进 5. She bought fame at the expense of her happiness and health.她牺牲了幸福和健康换得名誉。