YOU SAID:
I can't believe that sliced bread existed all this time!
INTO JAPANESE
スライスされたパンがずっと存在していたなんて信じられません!
BACK INTO ENGLISH
I can't believe sliced bread has been around for so long!
INTO JAPANESE
スライスされたパンがこんなに長い間存在しているなんて信じられません!
BACK INTO ENGLISH
I can't believe sliced bread has been around for so long!
That didn't even make that much sense in English.