“中”是一个很常用的字，可以表示位置的中间，也可以表示在某个范围里面，比如“中国”“房间中”。

"中" is a very common character that can indicate the middle position or being within a certain range, such as in "中国" or "房间中".

读第四声的时候，“中”表示“正好打到”或者“考上、被选上”的意思。

When pronounced with the fourth tone, "中" means "to hit exactly" or "to pass/select successfully."