YOU SAID:

I can´t understand how this machine is working.

INTO JAPANESE

私はこの機械がどのように働いているのか理解できません。

BACK INTO ENGLISH

I can not understand how this machine works.

INTO JAPANESE

私はこの機械の仕組みを理解できません。

BACK INTO ENGLISH

I can not understand the mechanism of this machine.

INTO JAPANESE

私はこの機械の仕組みを理解できません。

BACK INTO ENGLISH

I can not understand the mechanism of this machine.