YOU SAID:
Sarah packfish packs the fish by the pack.
INTO JAPANESE
サラ packfish は、パックで魚をパックします。
BACK INTO ENGLISH
Sarah packfish the pack fish in a pack.
INTO JAPANESE
サラ packfish パックでパックの魚。
BACK INTO ENGLISH
Sarah packfish Pack is a pack of fish.
INTO JAPANESE
サラ packfish パックは、魚のパックです。
BACK INTO ENGLISH
Sarah packfish Pack is a pack of fish.
That didn't even make that much sense in English.