fall flat

动词 fall flat:

1. fail utterly; collapse
   同义词：fall through, founder, flop

1. She fall flat on her face as she get out of the car.
   她一下车便直挺挺地脸朝下倒了下去。
2. She was in a miserable mood and all my attempts to cheer her up fell flat.
   她心境很坏，我想使她高兴的一切努力都彻底失败了。