YOU SAID:

To keep your pants off one must remove their trousers

INTO JAPANESE

あなたのズボンをオフに保つためには、彼らのズボンを取り外さなければなりません

BACK INTO ENGLISH

In order to keep your pants off you have to remove their pants

INTO JAPANESE

あなたのズボンを外しておくためには、ズボンを外さなければなりません

BACK INTO ENGLISH

In order to keep your pants out, you must remove the pants

INTO JAPANESE

あなたのズボンを守るためには、ズボンを取り外す必要があります

BACK INTO ENGLISH

In order to protect your pants you need to remove the pants

INTO JAPANESE

あなたのズボンを保護するためには、ズボンを取り外す必要があります

BACK INTO ENGLISH

In order to protect your pants you need to remove the pants