The third part is the design of the host transmission which includes the calculating the intension and flinch of the roller , and decide the dimension of the host roller and the driven roller;
三是主传动的设计，包括洗浆机辊筒的强度和挠度计算，最后定出主、从动辊的结构尺寸；
The intensity of transmission depends on factors related to the parasite, the vector, the human host, and the environment.
传播严重程度取决于寄生虫、病媒、人类宿主和环境等有关因素。
By complicating the understanding of viral evolution, the new findings also promise to help inform transmission dynamics and the ways in which viruses move among different host species.
这项新发现让病毒的进化方式变得更加令人费解，同时也有助于解释传输动力学和病毒从一个宿主感染给另一个宿主的方式。
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