If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.

而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。

youdao

New media technologies inevitably change the works they transmit-the medium becoming the message, as the Canadian scholar first observed.

新兴媒体技术不可避免得也随之转变了他们的角色——据加拿大学者们首次发现，媒体转变为消息提供者。

youdao

But fundamentally social media is a peer-to-peer medium; bloggers would rather hear from someone doing something cool than from the paid promotional representative for that person.

但是，从根本上讲，社会媒体是一个点对点的媒体，博客作者更愿意从那些做很酷的事情的那些人口中听到消息，而不愿意接受那些人付钱雇佣的促销代表所传递的信息。

youdao

The PR runway show at Lincoln Center will feature the collections of three finalists from season nine and is expected to utilize virtually every social media medium at its disposal.

FORBES: The Most Influential Designers At Fashion Week

For instance, as I previously wrote, many companies treat social media as a broadcast medium, when social media should be a mechanism for one-to-one and many-to-many conversations with customers, employees, investors, and other key stakeholders.

FORBES: Bubble Deflated, Social Media Will Now Change the World

"This new way of building communities and sharing with one another is the way that modern movements will take hold, and social media is the medium that can connect these communities, not only at greater speeds and across boundaries, but in authentic and lasting ways, " said Kathy Calvin, CEO of the U.N.

CNN: Black Friday, Cyber Monday and now #GivingTuesday