Here,Irving Berlin sings "Oh,How I Hate to Get Up in the Morning."
VOA: special.2009.12.20
Okay. Good. Now I see some of you out there from-- like this, not really participating, and if I can get up here--Think about this.
很好,我刚看到你们中的一些在那里,像这样,没有真正参与进来,如果我在台上,想一想
Now, to get to the number of neutrons, what we do is go up here to the upper left.
现在,看看中子数,我们要做的,是看到这左上方。
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