Let's go back to considering the wavelengths of different objects. We considered a baseball, but let's also think about now an electron.

我们来重新考虑不同物体的波长,我们刚才考虑了棒球，现在来考虑一下电子。

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Let's see if we could sing it together because we're going to do this in a different way in a second.

那我们试试把它唱出来吧，一会我们就要换一种方法了。

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So let me turn to a different approach to solving the question, answering the question,which one should we believe?

所以让我用另一个方法来解决这个问题，回答该相信哪一个理论的问题？

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We prepare for different things that could happen and we let things play out.

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Or, we can say that this time will be different -- that this time we will not let terror, or turbulence, or posturing, or petty politics stand in the way.

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Some of the Republicans in the House are coming up with all sorts of different reasons why we should just let these rates double.

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