YOU SAID:

It is very nice to see that she sells sea shells on the sea shore, but if sea shores are abundant in sea shells why would anyone buy sea shells in the first place?

INTO JAPANESE

彼女が海岸で貝殻を売っているのを見るのはとてもうれしいですが、海岸に貝殻が豊富にあるなら、そもそもなぜ貝殻を買うのでしょうか？

BACK INTO ENGLISH

I'm very happy to see her selling shells on the beach, but if there are plenty of shells on the beach, why buy shells in the first place?

INTO JAPANESE

彼女がビーチで貝を売っているのを見るのはとてもうれしいですが、ビーチに貝がたくさんあるなら、そもそも貝を買うのはなぜですか？

BACK INTO ENGLISH

I'm very happy to see her selling shells on the beach, but if there are lots of shells on the beach, why buy shells in the first place?

INTO JAPANESE

彼女がビーチで貝を売っているのを見るのはとてもうれしいですが、ビーチに貝がたくさんあるなら、そもそも貝を買うのはなぜですか？

BACK INTO ENGLISH

I'm very happy to see her selling shells on the beach, but if there are lots of shells on the beach, why buy shells in the first place?