1. She doubled her investment in a year. 她一年内增加了一倍的投资。
2. In the past year, the Treasury has doubled the number of note and bond auctions to 72. 过去一年，美国财政部票据和债券的拍卖次数增加了一倍，达72次。
3. Red can hit a target only for clearance, the first hit 1000, increase incentives for a hit on each doubled! 只有连续击中靶子红心才能过关，第一次击中得1000分，每连续增加一次击中就奖励翻倍！
