gōng / zuò / rén / yuán / xiān / bǎ / yú / zhǒng / fàng / jìn / chí / táng / zài / guān / chá / shuǐ / zhì

工作人员先把鱼种放进池塘，再观察水质。

The staff first put the fingerlings into the pond and then checked the water quality.