振动散射

流利美国口语6.1

W: You look so excited. Whats on your mind? M: I am thinking about my Chrisman present. W: What are you going to have? M: A huge toy plane. My mother promised to give it to me if I behave myself before Christmas. Dialogue 2. M: Anna, whats troubling

发表于:2018-12-17 / 阅读(135) / 评论(0)

流利美国口语

TED演讲：气味背后的科学(10)

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

发表于:2018-12-19 / 阅读(31) / 评论(0)

TED演讲教育篇

TED演讲：气味背后的科学(5)

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

发表于:2018-12-19 / 阅读(31) / 评论(0)

TED演讲教育篇

TED演讲：气味背后的科学(7)

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,

发表于:2018-12-19 / 阅读(47) / 评论(0)

TED演讲教育篇

TED演讲：气味背后的科学(9)

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

发表于:2018-12-19 / 阅读(20) / 评论(0)

TED演讲教育篇

SSS 2011-10-26

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Used to be if spies wanted to eavesdrop, they planted a bug. These days, it's much easier. Because we all carry potential bugs in our pocketssmartphones. One t

发表于:2018-12-24 / 阅读(64) / 评论(0)

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