YOU SAID:

some of it is water actually most of it is water

INTO JAPANESE

それのいくつかは実際にそれのほとんどは水水です。

BACK INTO ENGLISH

Some of it is in fact most of it is water.

INTO JAPANESE

それのいくつかは実際にはほとんどが水。

BACK INTO ENGLISH

In fact some of it is mostly water.

INTO JAPANESE

実際にそれのいくつかは主に水です。

BACK INTO ENGLISH

In fact some of it is mostly water.