a closed door的用法和样例：
- The sound of a closing door fell upon his ears.
- After looking at all the rooms my mom had decorated, I noticed a closed door.
- Egyptian foreign ministry spokesman Hossam Zaki told reporters the resolution was adopted by consensus during a closed door meeting."There was a lengthy debate.
- And as long as I live I shall remember walking along an empty corridor and suddenly hearing from behind a closed door a scream of pain and horror such as I have never heard since.
- South Korean lawmaker, Won Hye-young, tells reporters the disclosure was made today (Wednesday) at a closed door session with officials from the National Intelligence Service.