学英语，英国B-B-C的经验是，“为什么不用学母语的方式学英语呢？”大家学母语都是先学说后认字的吧？听说应该先于阅读才对。

学习英语要循序渐进，对于普通学习者来说，可以选择慢速英语作为入门。B-B-C的慢速英语收集整理了很多生活话题，它从身边事物入手，引导大家循序渐进学习，侧重于听力练习，让你不知不觉学会英语。

本期的主题是寒冷对身体的影响。天冷会影响我们的身体。寒冷的天气会对我们造成哪些影响？在什么温度下，它会开始影响我们的身体？听听他们怎么说。

点击下方听音频

BBC英语-寒冷对身体的影响.mp3（没法传音频，需要私）

先听一遍，肯定有生词，不要紧，看看下面的单词表。

⇒polar 极地的
⇒depths of winter 隆冬
⇒cold storage 冷藏
⇒thermal 保暖的
⇒freezing （天气）极冷的
⇒chilly 寒冷的
⇒arctic conditions 天气极其寒冷
⇒range 范围
⇒drop 下降
⇒hypothermia 体温过低
⇒shivering （因寒冷）发抖
⇒regulate 调节
⇒Celsius 摄氏度
⇒biting cold 严寒
⇒endure 忍受
⇒cool （使）冷却，（使）变凉
⇒insulation 防御寒冷，保暖
⇒warmth 温暖
⇒comfortable 舒适的。

学习了生词，回过头再听几遍，争取每句话都听懂，没听出来的对照下面的英文原稿。

When we think of low temperature as a danger, we often imagine people working outside in polar regions in the depths of winter or in cold storage facilities, layered in thermal clothing to help them deal with freezing temperatures. But do we also need to protect ourselves when it's just a bit chilly as well as in arctic conditions?

As mammals, our bodies have to maintain an internal temperature in a narrow range between 37 and 37.5C. If that temperature drops, the effects can be serious. Below 35C, people can develop hypothermia, with symptoms such as shivering, confusion, and slurred speech. If body temperature drops below 29C, it can lead to loss of consciousness. Fortunately our bodies can regulate their internal temperature, but there are some negative side effects which come with this process.

Ten degrees Celsius is hardly biting cold, but that's the temperature that B-B-C journalist James Gallagher was made to endure in an experiment at the University of South Wales. As the test room was cooled from 21 degrees, his blood pressure, heart rate and breathing rate all increased, while the flow of blood to his brain decreased by 20%. What are the consequences of this? Immediately, it meant that Gallagher took longer to solve some simple puzzles. As a longer-term risk, Professor Damian Bailey points out that increased blood pressure puts us at greater risk of stroke and heart attacks.

Professor Bailey suggests that in the cold, people should wear clothing that provides good insulation, eat more carbohydrates, and be more active. Another approach is suggested by Professor Christopher Minson. He believes that people are too reliant on being able to control the temperature around them, and that we can gradually train ourselves to cope with a lack of warmth and be comfortable at lower temperatures. So, while moderately low temperatures can have an effect on us, there are steps we can take to cope with them.

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