YOU SAID:
the rain in spain falls mainly on the plain
INTO JAPANESE
スペインの雨は主に平原に降る。
BACK INTO ENGLISH
The rain in Spain falls mainly on the plain.
INTO JAPANESE
スペインの雨は主に平原に降る。
BACK INTO ENGLISH
The rain in Spain falls mainly on the plain.
That didn't even make that much sense in English.