每天一个生活口语话题，一段地道的举例回答，并附有详细的词汇，发音及用法讲解。讲解材料选自当今最先进最有效的英语原版教材，更加贴近生活。每天坚持听讲解，并根据问题练习，给自己一个地道输入和输出的机会，你也可以张口自信说英语。

主题：Do you think that human activity is posing a threat to the oceans of the world?

There is no doubt that humans have had a huge impact on the ocean. In fact, evidence of humans can be found all over the oceans, even in the most remote polar areas, in the form of floating trash. Human acts are posing major threats to marine systems, which I believe we eventually will have to pay the price.

Posing a threat to: 造成威胁
Impact: 影响
Remote: 偏远的
Polar area: 极地
Float: 漂浮的
Trash: 垃圾
Marine system: 海洋系统
Pay the price: 付出代价