YOU SAID:
A library serves no purpose unless someone is using it
INTO JAPANESE
ライブラリは、誰かがそれを使用していない限り、役に立たない
BACK INTO ENGLISH
The library is useless unless someone uses it
INTO JAPANESE
誰かがそれを使用しない限り、図書館は役に立たない
BACK INTO ENGLISH
The library is useless unless someone uses it
That didn't even make that much sense in English.