1. She fell flat on her face as she got out of the car.
    她一下车便直挺挺地脸朝下倒了下去。

2. His jokes all fell flat.
    他的那些笑话都不好笑。

1. 平躺在地上：192. faithful to忠实于 | 193. fall flat 平躺在地上 | 194. familiar to sb为...所熟悉

2. fall flat

2. 失败：Fall by the way 半途而废 | fall flat 失败 | A fall to the pit; again in your wit. 吃一堑,长一智.

3. 摔得结结实实,落得无趣：foll back on别无选择,只得使用 | fall flat摔得结结实实,落得无趣 | fall from grace失宠

4. 完全失败：fall behind落后 | fall flat完全失败 | fall for爱上,受...的骗

1. fail utterly
    collapse

    e.g. The project foundered

    Synonym: fall throughfounderflop