6.to keep the lid on sth<非正式>限制…;控制…;防止…
It would be up to the Bank of England to keep the lid on inflation.控制通货膨胀是英格兰银行的责任。
The soldiers' presence seemed to keep a lid on the violence.士兵的出现似乎使暴力场面得到了控制。
I was trying to keep a lid on my emotions.我在努力控制自己的感情。