The black bile, sourly bitter, rose in Bonasera's throat, overflowed through tightly clenched teeth.

黑胆汁，坏心眼地苦涩，上升博纳塞拉的喉咙，咬紧牙关，通过严格溢出。

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As bile has to be taken from black bears twice a day, one in the morning and the other in the evening, if they are raised in the open air, it will lower the efficiency.

因为黑熊取胆是早晚各一次，如果放养会降低效率。

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The term melancholy derives from the Greek words for black bile.

“忧郁”一词源于希腊文中表示“黑胆汁”的词。

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Digestive bile is forcibly extracted from the gall bladders of bears, to be sold on the black market for use in traditional medicine.

BBC: Moon bear in Vietnamese bear farm