shī / gōng / rén / yuán / xiān / bǎ / gǔ / liào / hé / shuǐ / ní / hùn / hé / jūn / yún / zài / jiā / rù / shì / liàng / de / shuǐ

施工人员先把骨料和水泥混合均匀，再加入适量的水。

The construction workers first mix the aggregate and cement evenly, then add an appropriate amount of water.