KEEP A LID ON：Keep a lid on DefinitionMeaning - Merriam-Webster

keep a lid on   keep this a secret from mom The meaning of KEEP A LID ON is to keep something secret from being known. How to use keep a lid on in a sentence

keep a watchful eye on the bridges Learn how microwave sensors can detect damage in bridges by measuring their vibrations and resonances. This passage is from an IELTS Data Reading test with questions and answers

keep off là gì Keep off có nghĩa là ngăn cho cái gì đó chạm vào cái gì đó hoặc ngăn cho ai đó đi vào một khu vực nào đó. Xem ví dụ, cấu trúc và các ý nghĩa khác của keep on, keep up