at a blow

例句：

1. 1.She was able to finish the project at a blow.
   她一蹴而就地完成了这个项目。
2. 2.The company was able to secure the deal at a blow.
   公司一蹴而就地获得了这笔交易。
3. 3. He was able to win the competition at a blow.
   他一蹴而就地赢得了比赛。