牢牢控制

例句：

1. 1.The police are trying to control the crowd.
   警方正试图控制人群。
2. 2. She controls her temper well.
   她很好地控制了自己的脾气。
3. 3. The company has been trying to control costs by reducing staff.
   该公司一直在努力通过减少员工来控制成本。