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They haven't changed because their environment has stayed the same. The water they live in bubbles up from deep in the earth, and so it's always the same temperature. But just meters away the environm

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Now, coumarin is a very common thing, a material, in fragrance which is derived from a bean that comes from South America. 香豆素是香水中一个十分平常的原料，从来自南美的豆子中提炼出来的。 And it is the classic syntheti

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And...but...but...we have to go a little beyond that. 我们需要进一步深入。 Now let me explain why vibrational theory has some sort of interest in it. 现在我来解释为什么震动理论有一定的道理。 These molecules, as you saw i

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However, I managed to get a hold of a Borane eventually, and here is the beast. 无论如何，我最终得到了一些硼烷，这就是那个怪物。 And it really does have the same -- if you calculate, if you measure the vibrational frequencies,

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And every single part of this mechanism is actually plausible in biology. 实际上，这个机制的每一个步骤在生物领域中都是可行的。 In other words, I've taken off-the-shelf components, and I've made a spectroscope. 换句话讲，我

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[0:0]discourage disgust disk dismiss [0:46.4036]disorder display disposal dispose

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It felt as valid perhaps even as American culture. 它甚至可以和美国文化相媲美。 Then a friend of a friend of mine had a daughter who was a dwarf. 我朋友的朋友有个女儿，是个小矮人。 And when her daughter was born, 当她女

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The child scampered off into the bushes and was lost to sight. 那姑娘匆匆地跑掉了，消失在灌木丛里。 Exquisite little creature! said the Director, looking after her. 美妙的小东西！主任望着她说， Then, turning to his stu

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His wife looked at him in amusement. 他的妻子有些好笑地看着他。 It's not too serious now, she said. But it will be serious two or three years from now when Louis falls in love, as he will surely do. 现在情况还不算太严重，她说，

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The dark mood was evident in the ad that was developed in January 1985, 这种负面情绪在苹果公司1985年1月的广告中也有所体现， which was supposed to reprise the anti-IBM sentiment of the resonant 1984 ad. 这次的广告试图再次

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