flat out

副词 flat out:

1. in a blunt direct manner
   同义词：bluffly, bluntly, brusquely, roundly
2. at top speed
   同义词：like blue murder

1. After running in the marathon, she was flat out for a week.
   她参加马拉松比赛後一星期都疲惫不堪。
2. He spread the map flat out on the floor.
   他把地图平铺在地上。