YOU SAID:

I can't believe that humans breathe using their lungs!

INTO JAPANESE

人間が肺を使って呼吸しているなんて信じられません！

BACK INTO ENGLISH

I can't believe humans are breathing with their lungs!

INTO JAPANESE

人間が肺で呼吸しているなんて信じられない！

BACK INTO ENGLISH

I can't believe humans are breathing in the lungs!

INTO JAPANESE

人間が肺で呼吸しているなんて信じられない！

BACK INTO ENGLISH

I can't believe humans are breathing in the lungs!