YOU SAID:

Yeah, he only has two brain cells.

INTO JAPANESE

ええ、彼は2つの脳細胞しか持っていません。

BACK INTO ENGLISH

Yes, he has only two brain cells.

INTO JAPANESE

はい、彼は脳細胞を2つしか持っていません。

BACK INTO ENGLISH

Yes, he has only two brain cells.