When a virus enters your body, your body has to recognize it, then produce a protein called an antibody. 当病毒进入你的身体,你的身体会进行识别,然后产生一种被称为抗体的蛋白质。 These antibodies attach to the virus and...
The next time you're at a park, watch children playing on a merry-go-round and you'll notice that kids sitting in the center of the merry-go-round don't get as dizzy as those hanging on the edge. 下次你在公园看着孩子们乘坐旋转木马,你会...
The next time you're at a park, watch children playing on a merry-go-round and you'll notice that kids sitting in the center of the merry-go-round don't get as dizzy as those hanging on the edge. 下次你在公园看着孩子们乘坐旋转木马,你会...
Generally speaking, the larger the circle you move in, the greater the centripetal force you experience. 一般来说,你所处运动的圆圈越大,你所经历的向心力就越大。 So, the farther you move away from the center of the merry-go-ro...
Usually a green, sour fruit is just a fruit that's not ripe yet. 通常绿绿色,酸酸的水果只是表明水果还不成熟。 If you left a lime on the tree longer would it eventually change color and become sweet, like an orange? 如果你长时间...
Plants attract fruit eatersor frugivores 植物吸引以水果为食者或食果动物。 by packing valuable resources into their fruits like sugar and water 通过将糖分，水分等有价值的资源 or important nutrients such as carotenoids, v...
Have you ever noticed that while it's pretty easy to tell your dog is sick,it's much harder to know how your cat or bird are feeling? 你有没有注意到,自家狗生病很容易就被你发现,但很难知晓你的猫或鸟是何感觉? Well, befo...
Now, even small dogs are genetically programmed to function like predators, which makes sense considering they are close relatives of wolves. 现在,即使是小狗也已经由基因决定是肉食动物,考虑到它们是狼的近亲就变得很好理...
Did you ever wonder what occurs inside your body when something funny happens? 你有没有想过当有趣的事情发生时你身体里面会发生什么? What is this thing we have in our brains that makes us say ha-ha when someone slips on a banan...
When subjects were looking at something funny, the first thing that happen was that two regions in their left hemispheres lit up. 当受试者们看到有趣的东西,首先就是他们大脑左半球的两个区域亮了起来。 From previous studi...
Point at a ball and a dog will look at the ball, whereas a cat will probably look at your hand. 当你用手指着球，狗会注视着球,而猫则可能会盯着你的手看个不停。 Dogs seem to have a ready understanding of how human beings di...
But it was hard for wolves. 但对狼而言却是难事。 Wolves that have been raised by people should have had the same success at finding the sealed container, but they didn't. 被人类所抚养的狼应该和狗一样找到密封容器,但它们却...
Hey,Yael.Check out my new high-tech socks. 嘿,雅艾尔。看看我这双最新款高科技的袜子。 Still like boring old socks, Don. 唐，这就是双土里土气的旧袜子嘛。 What's so high-tech about them? 高科技是指内有乾坤吗...
How come socks don't lose their power like insoles do? 为什么这种袜子没像鞋垫那样失去效果呢? There are several kinds of odor preventing and odor destroying treatments for textiles. 这是因为袜子织物纤维中有一些防臭和祛...
For some time now, scientists have understood that the earth's crust is divided into plates that move about at the rate of a few inches a year. 现在科学家们已经搞清楚地壳分为各个板块，而且板块间以每年几英寸的速度移动...
