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江西省儿童医院取环手术

楼主:平安新闻 时间:2018年01月22日 02:45:00 点击:0 回复:0
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I was sitting on my Porsche yesterday,having a soda,and a wasp picked its head into the can and drink from mysoda.昨儿我坐在我的保时捷里,喝着汽水,一只黄蜂将头伸进了我的瓶子,喝起了我的汽水。For the sugar I konw thats why I drink soda.我知道我喝汽水是为了糖分,But the Garmin wondering about how differentinsects drink.但是Garmin好奇不同的昆虫都是怎样喝东西的呢?I mean insects need water just like the rest of us.我的意思是昆虫也像我们一样需要水分。You are right! Insects do need water.是这样的!昆虫确实需要水分。How they get their water depends a lot on their diets.但是它们怎样饮水很大程度上是取决与他们的饮食习惯。Herbivorous insects, those that feed on plants, get most of their water from their preyfood because plants contain a lot of water.对于那些以植物为食的食草性昆虫来说,大部分水分都是从食物中获取的,因为植物很有很多水分。But carnivorous insects often have to get their water from somewhere other than their prey,and often theyll go to plants for their water too, drinking from fruit maybe.但是对于肉食性的昆虫来说,它们就的从其它地方获取水分,通常也是来自植物,或者水果。Or they might sip fromthe morning dew or from raindrops or from edges of ponds or puddles.它们或许还会从晨露、雨水、池塘或者水坑边进水。If they’re blood suckers, they probably get their water from their food.如果是吸血类的,它们大概就是从食物中获取水分。Its worth noting that notall mouthparts are the same and this too affects the ways an insect is able to get water.值得一提的是,昆虫的口器是不一样的,这就大大影响了它们喝水的方式。There arebasically two kinds of insect mouths.昆虫的口器大概可分为两类。There are chewers and suckers.它们便是咀嚼式口器及吸收式口器。Some chewers may have a difficult time trying to draw waterfrom a pond, whereas getting their water from chewing a leaf is simple.一些咀嚼式口器在池塘边喝水可能会有困难,所以通过咀嚼叶子来获取水分会更简单。Suckers, on the other hand, have a tube-likemouth part called a proboscis that allows them toget liquid by sucking or lapping, whether from the nectar of flowers or from a soda can.而吸收式口器则有一个管状叫做“喙”的部分,它可以让昆虫通过吸或舔的方式获得水分,不论是从花的花蜜中还是从汽水瓶都可以。Or from my arm, right?从我的手臂也行,对吧?Thats true.是的! 201406/305946

Don:Heres a simple demonstration you can do with cool implications.唐:这是一个你可以做的具有很酷含义的简单演示。Find a large object that is brightly colored--lets make it a green door.找一个色鲜艳的大物件—让我们使它摇身一变成为一道绿色门。Stand with that door to your side but dont look directly at it; you want it to be in your peripheral vision.站在那扇门身边,但不要直视,你要想它是在你的周边视觉中。Now, without shifting your gaze, examine the door in the edge of your field of vision.现在,不用转移你的目光,仔细审视在你视野边缘的这扇门。What color is it? Answer? Its still green.它是什么颜色的?回答?它仍然是绿色的。Yael:Its still green? What kind of experiment is that?雅艾尔:它仍然是绿色的吗?这个实验到底想说明什么?I thought you were going to say something happens to the color.我以为你会说颜色发生了某些变化。Don:Thats exactly right!唐:完全正确!The color stays green, which means something has happened-- because nothing in your peripheral vision should have any color at all.之所以仍然是绿色,这意味着发生了一些事情—因为在你的周边视觉里应该应该没有任何颜色。Yael:Nothing in your peripheral vision should have any color? Why not?雅艾尔:在你的周边视觉内应该没有任何颜色?为什么没有呢?Don:Because color is what we perceive when light of a particular frequency meets cones-special cells in your retina.唐:因为颜色是特定频率光线投射到视网膜锥细胞上我们的感知。But the light being reflected off the door is only landing on the outside edge of your retina.但被反射到门的光只是在你的视网膜外边缘。And there are almost no cones on the edges.而且在边缘几乎没有视锥细胞。Everything we see roughly seventy-five degrees away from the point were fixed on should be black and white.从这一个固定的点大约七十五度我们看到的一切事物都应该是黑白两色。Yael:Thats fascinating! But why is the door still green?雅艾尔:太神奇了!但为什么门还是绿色的?Don:Presumably the door remains green because vision isnt a simple matter of retinal cells.唐:大概门仍然是绿色的是因为视觉不是简单的视网膜细胞。All the data your eyes send is interpreted by the brain.你眼中的所有数据发送给大脑解读。Your brain knows that the door is green, so it supplies information that isnt really there to keep the image stable.你的大脑知道门是绿色的,所以它提供信息,并不是真的在那里保持图像稳定。This is just one of the many ways your brain saves time and energy by making reasonably safe assumptions about the world around you.这只是你的大脑通过对你周围环境合理安全的假设节省时间和精力的其中一种方式。 201311/264414

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