YOU SAID:
She sells sea shells by the sea
INTO JAPANESE
彼女は海で貝殻を売っています
BACK INTO ENGLISH
She sells shells at the sea
INTO JAPANESE
彼女は海で貝殻を売っている
BACK INTO ENGLISH
She is selling seashells at the sea
INTO JAPANESE
彼女は海で貝殻を売っています
BACK INTO ENGLISH
She sells shells at the sea
INTO JAPANESE
彼女は海で貝殻を売っている
BACK INTO ENGLISH
She is selling seashells at the sea
it is unlikely that this phrase will ever reach equilibrium