YOU SAID:

I bet we've been together for a billion years and I'll bet we'll be together for a billion more!

INTO JAPANESE

きっと私たちは10億年も一緒にいたし、きっとあと10億年も一緒にいるでしょう！

BACK INTO ENGLISH

I'm sure we've been together for a billion years, and I'm sure we'll be together for another billion years!

INTO JAPANESE

私たちはきっと10億年も一緒にいたし、きっとこれからも10億年は一緒にいるでしょう！

BACK INTO ENGLISH

We have surely been together for a billion years and will surely be together for another billion years!

INTO JAPANESE

私たちはきっと10億年も一緒にいたし、きっとこれからも10億年一緒にいるでしょう！

BACK INTO ENGLISH

We have surely been together for a billion years and will surely be together for another billion years!