对控制内交叉感染，预防疾病传播，有着十分重要的作用。
To control the disease within cross-infection and spread, plays a very important role.
造纸术的发明，对人类文化的传播起到不可估量的作用。
This invention played an incalculably important role in the spread of culture.
报纸的新闻报道对区域形象具有传播和塑造的作用。
The news report in newspapers can spread and shape regional image.
一部分候鸟在传播该种病毒方面的作用现在仍处于研究阶段。
The part of migratory birds play in spreading the virus is still being studied.
我相信，传播和沟通在教学和学习过程中发挥着核心作用。
I believe that communication plays a central role in the process of teaching and learning.
解释说明的作用，广告宣传的作用、传播知识的作用。
Explanation of the role, the role of advertising, the role of spreading knowledge.
解释说明的作用，广告宣传的作用、传播知识的作用。
Explanation of the role, the role of advertising, the role of spreading knowledge.
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