If you use an alcohol-based product instead of soap and water, make sure it contains at least sixty percent alcohol.

VOA: special.2010.09.29

Should it be customized, or in other words, made specific for the particular audience or can we create something that is an off-the-shelf product that people can use in many different environments?

应该为特定的受众，量身设计教育过程,还是制造,一种现成的产品,以供人们,在多种不同环境中使用？

麻省理工公开课 - 媒体、教育、市场课程节选