让我们想象一下，有一天，有个叫小明的小朋友在幼儿园玩得可开心了。他和朋友们在沙坑里堆城堡，在滑梯上“咻——”地滑下来，还分享了甜甜的饼干。
Let's imagine one day, a little boy named Xiaoming had so much fun at kindergarten. He built sandcastles with his friends in the sandbox, went "wheee—" down the slide, and shared yummy cookies together.
可是呀，有一些我们眼睛看不见的“小坏蛋”——我们叫它们病毒或者细菌——也跟着饼干一起，悄悄溜进了小明的嘴巴里。
这些小坏蛋可调皮了！它们坐着“食物滑梯”滑到小明的肚子里，然后就开始四处探险。它们觉得小明的身体真是个又温暖又舒服的大游乐场，于是决定在这里安家落户，还要生好多好多小宝宝呢！
But, there are some tiny troublemakers that our eyes can't see—we call them viruses or germs—and they sneak into Xiao Ming's mouth along with the cookie. These little troublemakers are so naughty! They slide down the "food slide" into Xiao Ming's tummy and start exploring everywhere. They think Xiao Ming's body is such a warm and cozy big playground, so they decide to make their home here and have lots and lots of babies!
这时候，小明身体里的“哨兵细胞”发现了不对劲。“嘀嘀嘀！警报！警报！有不明入侵者！”哨兵细胞立刻发出了紧急信号。
At that moment, the "guardian cells" inside Xiaoming noticed something strange. "Beep beep beep! Alert! Alert! Unknown intruder detected!" The guardian cells immediately sent out an emergency signal.
信号像闪电一样，传到了身体深处一个叫做“下丘脑”的地方。这个下丘脑呀，就像是我们身体里的“恒温空调遥控器”，平时它会把我们的体温稳稳地控制在37摄氏度左右，不冷不热，刚刚好。
The signal travels like lightning to a place deep inside your body called the hypothalamus. This hypothalamus is like the "thermostat remote control" for your body. Usually, it keeps your body temperature steady at around 37 degrees Celsius—not too hot, not too cold, just perfect.
下丘脑收到警报后，可严肃了！它想：“哼，这些小坏蛋最喜欢舒服的温度了。我要把‘空调’的温度调高一点，热死它们！”
After the hypothalamus gets the alarm, it becomes very serious! It thinks, "Hmm, these little troublemakers love comfortable temperatures the most. I'll turn up the 'air conditioner' a bit and make it too hot for them!"
于是，它立刻下达命令：“全体注意！调高体温设定点！”
So, it immediately gave the order: "Attention, everyone! Turn up the body temperature setting!"
命令一下，身体里可热闹啦！肌肉们接到命令，开始“嘿哟嘿哟”地加速工作，产生更多热量。你会不会觉得发烧前有时候会打寒战，冷得牙齿“咯咯”响？那就是肌肉们在拼命产热呢！
When the command comes, it gets really busy inside your body! The muscles receive the order and start working faster, "heave-ho, heave-ho," making more heat. Have you ever felt shivery and your teeth chattering before getting a fever? That's your muscles working hard to make heat!
血管们也接到命令，把靠近皮肤表面的血液往身体深处收，这样热量就不容易散出去啦。所以你的手脚摸起来可能凉凉的，但身体里面却像个小火炉。温度计“滴”的一声，显示38度了！
The blood vessels get an order too! They pull the blood away from your skin and deeper into your body, so the heat doesn't escape easily. That's why your hands and feet might feel cool, but inside your body, it's like a warm little stove. The thermometer beeps—it shows 38 degrees!
小明觉得浑身没力气，脸蛋红得像苹果，只想躺在沙发上盖着小毯子。妈妈很担心，但你知道吗？
Xiao Ming feels very tired all over. His cheeks are as red as apples. He just wants to lie on the sofa and cover himself with a little blanket. Mom is very worried, but you know what?
这时候，小明身体里的“超级英雄”们正干劲十足呢！首先出场的是“白细胞军团”！它们是我们身体的卫士，平时就在血液里巡逻。体温一升高，就像给它们吹响了冲锋号。
Right now, the "superheroes" inside Xiao Ming's body are working really hard! First up is the "White Blood Cell Army"! They are the guards of our body, always patrolling in the blood. When the body temperature rises, it's like a battle call for them to charge forward!
冲啊！兄弟们！温度升高了，我们的战斗力更强啦！”白细胞们跑得更快，战斗力也翻倍，到处寻找那些病毒和细菌小坏蛋，找到就把它们“啊呜”一口吃掉！
Charge! Brothers! The temperature is rising, and we're getting stronger!" The white blood cells run faster, their fighting power doubles, searching everywhere for those nasty little viruses and bacteria. When they find them, they gobble them up with a big "Gulp!"
然后，还有“干扰素信使”。它们是一种聪明的蛋白质，体温升高后，它们生产得更快了。它们跑到那些还没被病毒入侵的健康细胞门口，“咚咚咚”地敲门：“注意啦！有病毒！快把门窗关紧，别让坏蛋进来！”这样就能保护更多的细胞。
Next, we have "interferon messengers." They are clever proteins that work faster when your body gets warmer. They run to the doors of healthy cells that haven't been invaded by the virus and knock, "Knock, knock, knock! Watch out! There's a virus! Close your doors and windows tight, and don't let the bad guys in!" This way, they can protect more cells.
你看，发烧就像给身体里的防御部队打开了“增强模式”开关。温度高一点，坏蛋们繁殖得就慢一点，晕头转向；而我们自己的卫士们却更精神、更厉害！
这就像一场激烈的城堡攻防战，发烧就是城堡主动点燃了护城河里的火，让攻城的敌人热得受不了。
Look, having a fever is like turning on the "boost mode" switch for your body's defense team. When your temperature goes up a little, the bad germs slow down and get all dizzy, while our own defenders become more energetic and powerful! It's like an exciting castle battle—the fever is the castle lighting a fire in the moat to make the attacking enemies too hot to handle.
当然啦，太高的温度时间太长，对我们自己的城堡（也就是身体）也不好，可能会让里面的“居民”（就是各种细胞）也不舒服。
所以，当体温特别高的时候，比如超过39度，爸爸妈妈就会给我们吃退烧药，或者用温水擦擦身体，帮我们“降降温”，让战斗不要进行得太激烈，保护我们不会难受。这就像打仗也要有策略，不能一直用大火嘛。
Of course! If the temperature gets too high for too long, it's not good for our own castle—that's our body. It might make the "residents" inside—our cells—feel uncomfortable too. So when our body temperature gets very high, like over 39 degrees, Mom and Dad will give us medicine to reduce the fever or use a warm cloth to gently wipe our skin. This helps us "cool down" so the battle doesn't get too intense and we don't feel too bad. It's like in a fight—you need a good plan and can't just use big fires all the time.
不只是我们人类会发烧哦，很多动物朋友也会用这招来对付病菌。
科学家发现就连小小的蜥蜴，生病时也会爬到阳光下把自己晒得热热的；鱼儿会游到温暖的水域；连蚂蚁如果感染了真菌，也会主动去晒太阳提高体温呢！大自然是不是很奇妙？
Not only humans get fevers—many animal friends use this trick to fight germs too! Scientists found that even little lizards, when they feel sick, will crawl into the sunshine to warm themselves up. Fish swim to warmer water, and even ants, if they catch a fungus, will go out to sunbathe to raise their body temperature. Isn’t nature amazing?
所以，下次如果你或者你认识的小朋友不小心发烧了，不用太害怕。你可以把它想象成身体里正在上演一场精彩又激烈的“英雄大战”。
你要做的就是当一个好的“后勤部长”：乖乖地躺在床上休息，多喝温水（就像给战场送清凉的泉水），吃一些容易消化的食物（给英雄们补充能量），让身体里的超级英雄们没有后顾之忧，专心去打坏蛋。
So, next time if you or a friend gets a fever, don’t be too scared. You can imagine it as an exciting and intense "hero battle" happening inside your body. What you need to do is be a good "support captain": rest quietly in bed, drink plenty of warm water (like sending cool spring water to the battlefield), eat some easy-to-digest food (to give the heroes energy), and let the superheroes inside you focus on fighting the bad guys without any worries.
通常，战斗进行个两三天，英雄们大获全胜，体温这个“空调遥控器”就会慢慢把温度调回正常的37度。这时候，你会出一点汗，感觉轻松多了，胃口也回来了。这场仗，你的身体又打赢啦！
Usually, after a day or two of fighting, the heroes win big, and the body's "air conditioner remote control" slowly turns the temperature back to the normal 37 degrees. Then, you might sweat a little, feel much better, and your appetite comes back. Your body has won the battle again!
不过，要记住哦，如果“战况”特别激烈（体温非常高），或者战斗时间太长（发烧好几天不退），一定要及时告诉爸爸妈妈，让他们带你去医生叔叔阿姨那里看看。医生就像最高指挥官，能派出更厉害的“特种部队”（药物）来帮忙。返回搜狐，查看更多