YOU SAID:

since concrete and glass are both mostly made of sand, skyscrapers are really just giant sandcastles

INTO JAPANESE

コンクリートとガラスはどちらもほとんどが砂でできているので、超高層ビルは本当に巨大な砂の城です

BACK INTO ENGLISH

Skyscrapers are really huge sand castles, as both concrete and glass are mostly made of sand.

INTO JAPANESE

コンクリートとガラスの両方がほとんど砂でできているので、超高層ビルは本当に巨大な砂の城です。

BACK INTO ENGLISH

Skyscrapers are really huge sand castles, as both concrete and glass are mostly made of sand.