set upon

例句：

1. 1.The storm set upon the village unexpectedly.
   暴风雨突然袭击了村庄。
2. 2. He was set upon by a group of thugs.
   他被一群暴徒袭击了。
3. 3. The company's sudden decision set upon its employees.
   公司的突然决定让员工措手不及。