求翻译This is why,for example,we can understand how a lens focuses light without concern about the motion of each of the atoms of which the lens is composed.

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求翻译This is why,for example,we can understand how a lens focuses light without concern about the motion of each of the atoms of which the lens is composed.

求翻译This is why,for example,we can understand how a lens focuses light without concern about the motion of each of the atoms of which the lens is composed.
求翻译This is why,for example,we can understand how a lens focuses light without concern about the motion of each of the atoms of which the lens is composed.

求翻译This is why,for example,we can understand how a lens focuses light without concern about the motion of each of the atoms of which the lens is composed.
这就是为什么,打个比方,我们轻而易举就能理解透镜是如何聚光,但我们没必要去考虑组成透镜的原子是如何运动的.