YOU SAID:

He's the only one with a brain.

INTO JAPANESE

彼は、脳で 1 つだけです。

BACK INTO ENGLISH

He is only one in the brain.

INTO JAPANESE

彼は頭脳の 1 つだけです。

BACK INTO ENGLISH

He is only one of the brain.

INTO JAPANESE

彼は、脳の 1 つだけです。

BACK INTO ENGLISH

He is the only one of the brain.

INTO JAPANESE

彼は、脳の 1 つだけです。

BACK INTO ENGLISH

He is the only one of the brain.