今天我们要学的词是 pathogen. Pathogen is spelled P-A-T-H-O-G-E-N, pathogen.

Pathogen 的意思是病原体，病因。

With new studies indicating that the world population can expect about five new animal-borne pathogens to infect humanity each year, there is an urgency to curb the wildlife trade. 新的研究表明，全球范围内每年可能有大.约五种新的动物传播病原体感染人类，因此限制野生动物交易迫在眉睫。

Researchers who model the spread of pathogens say social distancing works because it reduces the effective strength of links between individuals，and that ultimately lowers the rate of transmission. 构筑病原体传播模型的研究人员说，保持社交距离是有效的，因为它削弱了人与之间联系的强度面最终降低了传播速度。

好的，我们今天学习的词是 pathogen, pathogen, pathogen.