YOU SAID:
Butterflies and bees are beneficial to flowers.
INTO JAPANESE
蝶や蜂、花に有益です。
BACK INTO ENGLISH
It is beneficial for butterflies, bees and flowers.
INTO JAPANESE
蝶、蜂と花にとって有益です。
BACK INTO ENGLISH
It is beneficial for butterflies, bees and flowers.
That didn't even make that much sense in English.