take a firm grip on oneself

• 在困难情况下克制自己；使自己镇定下来；冷静下来

take a firm grip on oneself的用法和样例：

例句

1. I lit a cigarette to caim my nerves.
   我点燃一支烟，冷静下来。
2. The Estonian team can now take a rest, and calm down.
   爱沙尼亚队现在可以休息，他们要冷静下来。