At least 7, 000 to 10, 000 black bears are raised in captivity. They are called "bear Bile".
至少有7000到10000头黑熊被圈养，成为“胆熊”。
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。
Originally, humor meant liquid or fluid in Latin, denoting primarily blood, phlegm, black bile, and yellow bile in medical terms.
幽默一词起源于拉丁语，意为液体、流体，医学上指代血液、粘液、黑色胆汁与黄色胆汁。
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