启用选择的媒体播放器 Enable Choice of Media Player
想要确保你能在最流行的社交媒体网站上，用自己的首选用户名来注册，这就是你最需要的。
In case you want to make sure you have registered your preferred username on popular social media sites this is the website you need.
德育工作者必须认识电教媒体的特性，才能合理选用，灵活替换。
Moral education workers should be aware of the characteristics of these media so as to make a reasonable selection and a flexible alternation of them.
然而，媒体组合选用得当，自然会降低失败的机率。
But with the proper media mix we can certainly lessen the chance of failure.
应用推荐