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2017年10月22日 14:34:07|来源:国际在线|编辑:千龙热点

Its an incredible idea. But most experts now believe that todays birds are the direct descendants of ancient dinosaurs.这是一个很不可思议的观点。但是大多数专家认为今天的鸟类是古代恐龙的直系后代。So does that mean birds actually are dinosaurs?这么说鸟类是恐龙?Yes. Absolutely.是的,当然。How can you be sure about that?你怎么如此肯定?You have evidence from the skeletal anatomy. You have evidence from the shape of the eggs and the microstructure of the eggshell, the discovery about a wealth of feathered dinosaurs, animals that are unquestionably dinosaurs and yet have feathers. They looked just like the feathers on modern birds.你能从骨骼解剖图里找到据,从卵的形状、卵壳在扫描电镜下的微观结构找到据。发现大量长有羽毛的动物,毫无疑问这种动物就是恐龙,长有羽毛的恐龙。他们看起来就像现代的鸟类。Its a discovery that revolutionizes the way we see dinosaurs. Even some tyrannosaurs were feathered. But the relationship between birds and dinosaurs can tell us much more than simply what they may have looked like.这个发现彻底改变了我们对恐龙的看法。有些霸王龙竟然也长有羽毛。鸟和恐龙的关系会为我们揭开更多奥秘,而不是仅仅展示外貌上的相似。So does this mean that we can use living birds to help us understand dinosaurs?那么这意味着我们能利用活着的鸟类帮助我们了解恐龙吗?Absolutely. You know you have 10,000 living species of birds that are providing you an enormous amount of information that you can use to understand the biology of the ancient dinosaurs.当然。你也知道世界上有10000种鸟类,这就为我们研究古代恐龙的生物学提供了大量的信息。Its quite amazing. But it also makes a certain degree of sense when really you look at them.这太令人惊奇了。但当你真正观察它们的时候,在一定程度上也合情理。If we want to learn about how the ancient dinosaurs moved and even how quickly they ran, few animals can tell us more than ostriches. They evolved on an early branch of the avian family tree. And like dinosaurs they are related to, they are large, bipedal and flightless.如果我们想要了解古代恐龙如何运动,了解他们跑得多快,那就没什么能比鸵鸟带来更多信息。鸵鸟是由早期的鸟类家族分进化而来。正如与之关系密切的恐龙一样,鸵鸟个头巨大,两足且不能飞翔。I have some living dinosaurs here to take a look at.我这儿有一些活恐龙可供观察。Hello, ladies.嗨,女士们。Theyre all ladies, are they?他们都是雌恐龙,是吗?Yes. Yes. They are a bit more manageable when they are females.是的,是的。雌恐龙才更容易控制。原文译文属!201210/203166

How Insects Drink?昆虫是怎样喝水的?A: I was sitting on my Porsche yesterday, having a soda, and a wasp picked its head into the can and drink from my soda. For the sugar i konw thats why I drink soda. But the Garmin wondering about how different insects drink. I mean insects need water just like the rest of us.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.我知道我喝汽水是为了(补充)糖分,但是Garmin(一种导航)好奇不同的昆虫都是怎样喝东西的呢?我的意思是昆虫也像我们一样需要水分。B: You are right! Insects do need water. How they get their water depends a lot on their diets. Herbivorous insects, those that feed on plants, get most of their water from their preyfood because plants contain a lot of water.是这样的!昆虫确实需要水分。但是它们怎样饮水很大程度上是取决与他们的饮食习惯。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. Or they might sip from the morning dew or from raindrops or from edges of ponds or puddles.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。它们或许还会从晨露、雨水、池塘或者水坑边进水。If theyre blood suckers, they probably get their water from their food. Its worth noting that not all mouthparts are the same and this too affects the ways an insect is able to get water. There are basically two kinds of insect mouths.如果是吸血类的,它们大概就是从食物中获取水分。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。昆虫的口器大概可分为两类。There are chewers and suckers. Some chewers may have a difficult time trying to draw water from a pond, whereas getting their water from chewing a leaf is simple.它们便是咀嚼式口器及吸收式口器。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-like mouthpart called a proboscis that allows them to get 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。A: Or from my arm, right?从我的手臂也行,对吧?B: Thats true.是的! /201211/210849

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