TED演讲:是什么造就了长城的无与伦比(1)
A 13,000 mile dragon of earth and stone winds its way through the countryside of China 一条1万3英里的土石之龙蜿蜒于中国乡野之间， with a history almost as long and serpentine as the structure. 它的历史几乎与其结构一样悠
TED演讲:是什么造就了长城的无与伦比(2)
Averaging 23 feet high and 21 feet wide, the walls 5500 miles were punctuated by watchtowers. 长城平均高7米，宽6米，5500英里的城墙中间隔着瞭望台。 When raiders were sighted, fire and smoke signals traveled between towers until
TED演讲:俄罗斯的起源(1)
Where did Russia come from, why is it so big, and what are the differences between it and its neighbors? 俄罗斯起源于哪里，为何幅员如此辽阔，它和其邻国有什么不同呢？ The answers lie in an epic story of seafaring warriors
TED演讲:俄罗斯的起源(2)
With Vladimir's conversion and marriage to the Byzantine emperor's sister, 通过弗拉米尔的转变，还有他和拜占庭皇妹的联姻 as well as continued trade along the Volga route, the relationship between the two civilizations deepened. 以
TED演讲:激发《权力的游戏》灵感的战争(1)
As far as we know, Medieval England was never invaded by ice zombies, or terrorized by dragons, 就我们所知，中世纪的英国不是被冰僵尸入侵，也不是受到恶龙的威胁， but it was shaken by a power struggle between two noble f
TED演讲:激发《权力的游戏》灵感的战争(1)
As far as we know, Medieval England was never invaded by ice zombies, or terrorized by dragons, 就我们所知，中世纪的英国不是被冰僵尸入侵，也不是受到恶龙的威胁， but it was shaken by a power struggle between two noble f
TED演讲:激发《权力的游戏》灵感的战争(2)
But instead of a crown, York's head acquired a pike after he was killed in battle with the Queen's loyalists. 可惜的是，理查约克没能成功戴上王冠，而是在与皇后的支持者对战时被一枝矛刺中而亡。 His young son took
TED演讲:动物有语言吗(1)
All animals communicate. 所有动物都会相互交流。 Crabs wave their claws at each other to signal that they're healthy and ready to mate. 螃蟹相互挥舞钳子表明它们健康并准备交配。 Cuttlefish use pigmented skin cells called
TED演讲:动物有语言吗(2)
Their alarms calls indicate the predator's size, shape, speed, and, 它们的警报展现了捕猎者的大小、体型、速度 even for human predators, what the person is wearing and if he's carrying a gun. 甚至包括人类狩猎者的穿着，以
TED演讲:压力会造成青春痘吗(1)
She's only a few feet away. 她就在不远处。 The closer he gets, the more nervous he becomes, 他越走近越紧张， the budding zit on his nose growing bigger and bigger until it practically eclipses his face. 鼻子上才刚长出来的青春痘
TED演讲:压力会造成青春痘吗(2)
The hypothalamus, the master controller of your hormones, releases something called corticotropin-releasing hormone. 下视丘是控制荷尔蒙的主宰，它会释放一种叫促肾上腺皮质释放素的物质。 This triggers the pituitary gland
TED演讲:什么是脂肪(1)
Olive oil is 100% fat; there's nothing else in it. 橄榄油含有100%的脂肪，除此之外没有别的。 Pancake mix, on the other hand, is only about 11% fat. 相反，煎饼只有约11%的脂肪。 And, yet, olive oil is good for you, and panc
TED演讲:什么是脂肪(2)
Now, even though both of these molecules are made up of exactly the same building blocks, 尽管这两种分子由一模一样的东西组成， they are two completely different substances, and they behave completely differently inside of us. 但它们
TED演讲:为什么油水不能混合(1)
Why does salt dissolve in water but oil doesn't? 为什么盐可溶于水而油却不行呢？ Well, in a word,chemistry. But that's not very satisfied, isn't it? 总的来说，是化学作用。但这并不令人满意，对吧？ Well, the reason
TED演讲:为什么油水不能混合(2)
As liquid water, these molecules are engaged in a constant and random square dance that is called the hydrogen bonding network. 作为液态水，这些分子从事着恒定而随机的被称为氢键网络的方块舞。 Entropy favors keeping the s
