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1.perk up 活跃起来
例句:He perks up and jokes with them.
他很活跃，还和他们开玩笑。
2.wind up 结束；使...紧张
例句:The President is about to wind up his visit to Somalia.
总统即将结束对索马里的访问。
3.retail business 零售业
例句:He does wholesale business, while his brother is engaged in retail business.
他经营批发生意，他弟弟则经营零售生意。
4.financial crisis 金融危机
例句:This financial crisis had a much greater impact on Main Street.
这次金融危机对老百姓的影响更为深远。
