The spacious library seems a bit crowded. -No conflicting notifications. Because, although spacious, but because there are too many people, the anti-spacious library can also be crowded. This is because many people write books by comparison.

The air in this library, which is closed all night, seems very fresh. -After closing, if there is no air circulation, it should not be fresh. It is said here that it is fresh when it is closed because there are too many people when it is not closed, and many people are crowded in one space. Let's breathe together. The air is even fresher than when it's closed. This is also a comparison of how many people write during the day.