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玛丽安：嗯，你知道光像电磁波那样传播，是吧？
Marian: Well, you know that light ACTS like a wave of electromagnetic energy, right?
youdao
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同年安高制造了第一个电磁体。
In the same year Argao made the first electromagnet.
youdao
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同年安高制造了第一个电磁体。
In the same year Argao made the first electromagnet.
youdao