关键问题在于我们生活在一个物理的世界里，我们的娱乐产品直到不久以前，也是以实物为媒介的。
The main problem, if that's the word, is that we live in the physical world and, until recently, most of our entertainment media did, too.
紧急灾民安置的环境有利于携带疾病的昆虫和啮齿动物(传播媒介)的生长扩散。它们可以破坏大量的实物。
The environment in a displaced person emergency is conducive to the proliferation of disease-carrying insects and rodents (vectors) that can also destroy or spoil large quantities of food.
语文课堂教学中实施启发式教学的方法有很多，如果按照传播的媒介来划分，可分为语言启发、实物启发、文字启发和电声启发等；
There are many ways to carry out heuristic teaching through the ways of providing the students oral materials, teaching aids . written materials, audio and video materials .
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