YOU SAID:

I don't know what this one does

INTO JAPANESE

これが何をしているのかわからない

BACK INTO ENGLISH

I don't know what this is doing.

INTO JAPANESE

理解できんのだ

BACK INTO ENGLISH

I don't know what this is.

INTO JAPANESE

理解できんのだ

BACK INTO ENGLISH

I don't know what this is.