YOU SAID:

You do not really understand something unless you can explain it to your grandmother.

INTO JAPANESE

祖母にそれを説明できない限り、あなたは本当に何かを理解していません。

BACK INTO ENGLISH

Unless you can explain it to my grandmother, you really do not understand something.

INTO JAPANESE

あなたが私の祖母にそれを説明できない限り、あなたは本当に何かを理解していません。

BACK INTO ENGLISH

Unless you can explain it to my grandmother, you really do not understand something.