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And now we repeat the experiment, only this time we come with an electron beam.
现在来重复一下实验，仅在这次我们得到了电子束。
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The electron gun can achieve energy scan of electron beam.
电子枪可以实现电子束能量扫描。
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The electron gun can achieve energy scan of electron beam.
电子枪可以实现电子束能量扫描。
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