口语进阶一般为更资深的英语学习者准备，包括对词汇的了解，对语态的理解等。下面请结合mp3以及下方的原文和翻译，开始今天的口语进阶练习吧！

原文及翻译

Flu season occurs only in countries that have cold weather in the winter. Although the influenza virus is alive throughout the world in all four seasons, it seems to have its greatest impact on humans during the winter. 

流感季节只发生在冬季寒冷的国家。尽管流感病毒在全世界四季都存在，但它似乎在冬季对人类的影响最大。

Scientists are not sure why. They think it's because in the winter, people are indoors and close together for longer periods of time. Also, the virus might be able to live longer and be stronger in colder weather. Finally, indoor air can dry up the mucus that helps protect people from the virus.

科学家们不确定原因。他们认为这是因为在冬天，人们在室内呆的时间更长，而且彼此靠得很近。此外，病毒在寒冷的天气里可能存活时间更长，而且更强大。最后，室内空气会使有助于保护人们免受病毒侵害的粘液变干。

In the US, the virus is not something to sneeze at. It kills about 36,000 people annually, most of them elderly. It also causes almost 250,000 people to end up in a hospital bed annually.

在美国，这种病毒并不是什么值得一提的东西。它每年导致约 36,000 人死亡，其中大多数是老年人。它还导致每年近 250,000 人最终住院。

以上就是本期的口语进阶练习，希望对您的口语水平有所帮助。您也可以访问网站主页，获取最新的英语学习资料，全方位提升英语能力。