When we get cold, sometimes our bodies start moving, even if we don't mean for them to.
Shivering (颤抖) is one of several ways the body tries to keep warm when it's cold out. In fact, your insides need to stay about the same temperature.
When your warm body meets cold air, the heat from your body flows (流动) into the air.It's like when you put a pot of water on the stove (炉子), and the hot fire warms the cold water. This time you're the fire, and the heat from your body is warming up the air around you. To make up for all the heat you're losing to the cold air, your body shivers to try to produce even more warmth.
Your body tries to make as much heat as it can on its own. When you shiver, your muscles (肌肉) move over and over again to give off heat. And it will keep your body a little warmer. What should you do? Then you'll get warm soon.
| A. Of course, put on a coat! B. But do you know the reason? C. Then how can we keep warm? D. Shivering helps make that happen. E. If you go outside in a T-shirt on a snowy day, you will shiver. F. This is because heat always flows from a hot thing to a cold thing. |
