到19世纪中叶的时候，科学家对被称为电磁力这一现象中三个组成部分(指电、磁和光，译者注)已经有了相当的了解。

By the mid-19th century scientists had a fair understanding of each of the three components of electromagnetism, as the phenomenon has come to be called.

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科学家们构想了一种在磁光晶体结构中的铁氧体磁棒阵列通道，这通道可以通过控制磁场而打开或关闭。

The scientists envision an array of ferrite rods in a magnetic photonic crystal structure that forms a gateway. The gateway could be opened and closed by controlling the magnetic fields.

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科学家们构想了一种在磁光晶体结构中的铁氧体磁棒阵列通道，这通道可以通过控制磁场而打开或关闭。

The scientists envision an array of ferrite rods in a magnetic photonic crystal structure that forms a gateway.The gateway could be opened and closed by controlling the magnetic fields.

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So with his optic glass, his telescope, Galileo was able to discern spots on the orb of the moon.

因此通过他的磁光玻璃，望远镜，伽利略能够分辨出月亮轨道上的斑点。

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