YOU SAID:

Physicists are unsure of what caused the big bang, but we can be certain the universe has been expanding for a very long time.

INTO JAPANESE

物理学者はビッグバンの原因を確信していませんが、宇宙が非常に長い間膨張してきたことは確かです。

BACK INTO ENGLISH

Physicists are not sure of the cause of the Big Bang, but it is certain that the universe has been expanding for a very long time.

INTO JAPANESE

物理学者はビッグバンの原因を確信していませんが、宇宙が非常に長い間膨張してきたことは確かです。

BACK INTO ENGLISH

Physicists are not sure of the cause of the Big Bang, but it is certain that the universe has been expanding for a very long time.