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Passage Two
短文二
Sunshine and high temperatures can mean picnics and parks and trips to beaches, but they can make your body react in some strange ways.
阳光和高温可能意味着享受野餐、公园游玩和海滩旅行，但它们会让你的身体产生一些奇怪的反应。
First, sunshine can actually affect your breath.
首先，阳光实际上会影响你的呼吸。
You may think that summer is the perfect time to go on a date or chat with an attractive boy or girl.
你可能会认为夏天是与一个有魅力的男孩或女孩约会或聊天的最佳时间。
But excessive heat can cause you to lose water, which has been proven to have a pretty unattractive side effect—bad breath.
但过热会导致你失水，事实证明，这会产生一种非常令人不爽的副作用——口臭。
When you are lacking water, your mouth becomes dry.
当你缺水时，你的嘴会变干。
Bacteria accumulate because there isn't enough water in your mouth to wash it away.
细菌会积聚，因为口腔中没有足够的水来将其冲走。
Sunshine can stop you from sweating, too.
阳光也能阻止你出汗。
The body's normal temperature is 36 to 37 degrees centigrade.
人体的正常温度为36至37摄氏度。
But if it heats up to 40 to 41 degrees, you may find yourself getting heatstroke.
但如果气温升高到40至41度，你可能会发现自己中暑。
At that point, your heat regulatory system can essentially quit, which stops you from sweating as your body tries to keep water around your vital organs.
彼时，你的热量调节系统实际上已经退出，会阻止你出汗，因为你的身体要保证重要器官周围有水分。
However, the sun can have a positive influence on your body by raising your energy levels.
然而，太阳可以通过提高你的能量水平对你的身体产生积极影响。
You might feel like the sun is giving you extra energy for your day, which is actually happening.
你可能会觉得太阳为你的一天提供了额外的能量，这是事实。
And vitamin D from sunshine can help your body to absorb certain minerals, which are linked to building stronger bones.
阳光中的维生素D可以帮助你的身体吸收某些矿物质，这些矿物质与强健骨骼有关。
Therefore, I suggest you spend more time in the park with your friends, but make sure you apply lots of skin protection and fill up those water bottles, too.
因此，我建议你花更多的时间和朋友在公园里，但要确保你涂上大量的皮肤保护霜，并把水瓶装满。
Questions 19 to 21 are based on the passage you have just heard.
请根据你刚听到的短文回答第19至21题。
19. What does the passage say about hot sunshine?
19.关于炎热的阳光，短文说了什么？
20. What does the passage say is a negative side effect of water loss?
20.关于失水的负作用，短文说了什么？
21. What is said to be a positive effect of sunshine?
21.阳光的积极作用是什么？
