这一变化趋势带来的一个效应就是那些容易成为疾病来源的小规模的非专业化经营的猪场减少了。

One resulting effect of this trend is that one common source of disease, which some smaller less professionally run farms are, is being reduced.

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然而，动植物卫生检验署(简写为APHIS)已经表示，野牛“可能是”怀俄明州和北达科他州家牛的这种疾病传播的来源。

However, the Animal and Plant Health Inspection Service (APHIS) has stated that Bison are the "likely source" of the spread of the disease in cattle in Wyoming and North Dakota.

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对灰尘、老鼠和昆虫的恐惧来源于自我保护意识，因为它们都能传播疾病。

Fears of dirt, rats, mice andinsects are obviously self-protective, since all these carry diseases.

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The third source of ritual impurity would be genital discharges, both normal and diseased.

第三个仪式上不洁的来源是生殖器排放，包括正常的和有疾病的。

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Humoral comes from the term humours and it used to be that we thought about disease as being caused by the balance of humours in our blood.

体液一词来源于体液学说,过去认为疾病的产生,与血中的体液平衡有关

耶鲁公开课 - 生物医学工程探索课程节选