Transmission is thought to have occurred via respiratory droplets, contact with throat or nasal secretions from the pigs, or contact with the tissue of a sick animal.
据认为，该病毒通过呼吸道产生的飞沫、与猪的喉咙或鼻腔分泌物接触，或与染病动物的组织接触进行传播。
This paper expound design thought, working principle and advantage of double track typed flexible transmission with multi point engagement.
阐述了新一代双轨道式多柔传动装置的设计思想、工作原理及优点等。
Many thought it was' miasma ', bad air, which played a key role in the transmission of disease.
很多人都认为“迷雾”，或者坏的空气，是传播疾病的罪魁祸首。
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