gōng / dì / shàng / duī / zhe / hěn / duō / shā / zi / zhǔn / bèi / yòng / lái / bàn / shuǐ / ní

工地上堆着很多砂子，准备用来拌水泥。

There is a lot of sand piled up at the construction site, ready to be used for mixing cement.