She decides which colors to work with, then places each bead on a board covered with cloth.
VOA: special.2009.05.18
And so they lay. 1853. Let's get Angstrom up on the board here since he did the work.
因此在183年这些就存在了,让我们把阿姆斯特朗,写到黑板上来,鉴于他做的这个工作。
Before I move on, I'm just going to put on the board another cycle, and I'm going to urge you to work through that on your own.
在我继续之前,我要在黑板上,画另一个循环,我希望你们,能自己去推导它,它已经被详尽地推导过了。
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