at one clap

• 一下子

at one clap的用法和样例：

例句

1. He beat his opponent at one bout.
   他一下子就打败了对手。
2. She solved the problem at a stroke.
   她一下子解决了问题。
3. They threw themselves at the door together.
   他们一齐向门撞去。
4. We all made pigs of ourselves at dinner and now feel rather sick.
   吃晚饭时，我们一齐大吃大喝，现在都有点想吐。