YOU SAID:
Sally's selling seashells by the seashore.
INTO JAPANESE
サリーは海岸の貝殻を売っている。
BACK INTO ENGLISH
Sally is selling coastal shells.
INTO JAPANESE
サリーは沿岸の貝殻を売っている。
BACK INTO ENGLISH
Sally is selling coastal shells.
That didn't even make that much sense in English.