chǔ / lǐ / huà / xué / pǐn / shí / bù / néng / bǎ / cán / yú / wù / zhí / jiē / dào / jìn / xià / shuǐ / dào处理化学品时,不能把残余物直接倒进下水道。When handling chemicals, do not pour the residue directly down the drain.