hēi / niào / zhèng / shì / yī / zhǒng / hǎn / jiàn / de / yí / chuán / dài / xiè / bìng / bìng / zhě / de / niào / yè / zài / kōng / qì / zhōng / fàng / zhì / hòu / huì / biàn / hēi

黑尿症是一种罕见的遗传代谢病，患者的尿液在空气中放置后会变黑。

Alkaptonuria is a rare inherited metabolic disorder in which a patient's urine turns black after being exposed to air.