thrash up

例句：

1. 1. The team was struggling to keep upwith the competition.
   球队正在努力跟上竞争的步伐。
2. 2.They were having a heated argument, thrashing around in their arguments.
   他们正在激烈地争吵，争论不休。
3. 3. The car wasthrashing up the hill, makingit difficult for anyone to get past.
   汽车在山上颠簸，使得任何人都难以通过。