shí / yàn / shì / lǐ / bì / xū / bǎ / fú / ěr / mǎ / lín / fàng / zài / tōng / fēng / guì / zhōng

实验室里必须把福尔马林放在通风柜中。

Formalin must be kept in a fume hood in the laboratory.