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2019年10月16日 07:33:52    日报  参与评论()人

蛇颈乌龟精品幼犬鬼多少钱一只开鲁县马来食螺龟云南闭壳龟马来西亚巨龟豹斑象龟黄额盒龟价格怎么养The tool you and I would call was daydreaming, but he gets it called thought experiment because he is Einstein.你和我管它叫白日梦,但是他就是称它为思想实验,因为他是爱因斯坦。In his office, the patent office, looking out of window and he imagined a man working on a roof.在他专利局的办公室里,他从窗口望去,他想象着在屋顶工作的一个人。And he begins to wonder what would happen if one of those men would fall off the roof.他开始想像如果其中一个男人会从屋顶上跌下来的情境。And then he had the happiest thought of his life, the inspiration of the ages.然后他有了的人生中最快乐的思想, 年龄的灵感。He had a vision the man would not actually be feeling his own weight.他曾经想那人不会感到自己的体重。He will be weightless. And then he imagined if you are in an elevator and somebody cuts the cord.他将是无重的。然后他想象如果是在电梯里,有人剪断绳索的情境。What happens to you?你会发生什么?You fall but the elevator falls at the same rate you do, so you are weightless inside the elevator. So then Einstein got it.你在下坠但电梯和你的速率是相同的,所以你处于失重而爱因斯坦有了结论。Its though the gravity has been switched off. Whats really going on?虽然引力已经关闭。这究竟是怎么一回事?The reason is no such a thing as gravitational pull.原因是没有所谓的引力。The earth has curved the space around me and space is pushing me into this chair. Space itself can be curved.在我身边的是地球弯曲的空间,空间推动我到这把椅子上。空间本身是可以弯曲的。注:听力文本来源于普特201203/176192齿缘龟喂养养殖指南 Zebra斑马After all, domesticating zebras is nothing new. Its not? No. In fact, people have been trying to domesticate zebras for about a hundred years. So the zebra market has aly been cornered? Not exactly. There is no zebra market, because zebras cant be domesticated.毕竟,驯化斑马并不是什么新奇事。不是吗?是的。事实上,近100年来,人们都试图驯化斑马。所以斑马市场一直处于窘境中?也不是。根本没有斑马市场,因为斑马驯化不了。Why not? Compared to horses, zebras are pretty unpredictable. They can be very aggressive and even vicious as they get older. Plus, their body shape doesnt take a saddle very well. Trying to train and ride a zebra is pretty dangerous.为什么?和普通马比起来,斑马相当难捉摸。他们可能十分具有攻击性,当他们变老时甚至变得凶猛。而且,他们的体型也不适合把鞍具装好。试图驯骑斑马很危险。So its impossible?所以驯化他们是不可能的了?Not impossible. Over the years, some zebras have been successfully trained, but as a group they just dont lend themselves to domestication. Some animal trainers and breeders have created zebra hybrids, such as the ;zorse,; a cross between a zebra and a horse, and the ;zonkey;, which is what you get when you cross a zebra and a donkey.也不是不可能。多年以来,一些斑马也被成功的驯化了。但是作为一个群种,他们不会让自己被驯化。一些驯兽师和饲养员已经成功的创造了混血斑马,比如斑马马——斑马和马和混血儿;斑驴——当你将斑马和驴杂交就可以得到它。That sounds likes creepy.听起来让人毛骨悚然。Yeah. So far theres no specific purpose to creating zebra hybrids; theyre not stronger or more useful than regular horses and donkeys.是啊,迄今为止,还没有特定目的要去创造混血斑马。斑马并不比普通的马和驴健壮或更有用。 /201208/194561本溪满族自治县靴脚陆龟咸水泥彩龟安哥洛卡象龟凹甲陆龟红腿象龟价格怎么养

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