This is the day when many people will be going out on a date with someone special in their lives.
VOA: special.2011.02.09
You can take something that's magnetic with a north-south 1 magnetization and just say arbitrarily, this will represent one.
你只需要一个北南极的磁性物体,任意指定,比方说代表。
What we're going to start with is discussing photoelectron spectroscopy, which is a spectroscopy technique that will give us some information about energy levels in multielectron atoms.
首先,我们将讨论,光电子能谱,通过这种技术,我们能够得到多电子原子的能级信息。
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