foul one's own nest

例句：

1. 1. The paint on the wall was fouled by fingerprints.
   墙上的油漆被指纹弄脏了。
2. 2.The food was spoiled before it could be served.
   食物在还未上桌之前就变质了。
3. 3.He was fouled by a sudden gust of wind.
   他被一阵突如其来的风刮得不舒服。