| 词组 | open and shut | 
| 释义 | open and shut if a legal case or problem is open and shut, the facts are very clear and it is easy to make a decision or find a solution. The police think the case is open and shut: five witnesses saw the man stealing the car. It's going to take a lot of work to deal with this problem. It certainly isn't an open-and-shut matter. | 
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