The microscope works by scanning a focused beam of electrons across an object.

扫描电子显微镜是通过扫描聚焦在物体上的电子束来工作的。

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A single pair of beams does not, however, produce a useful image. To do that requires scanning the object beam through the target about a hundred different ways.

不过仅利用一对光束并不能得到有用的图像，还需要从大约100个不同的角度让物体光束扫描目标。

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Thee microscope works by scanning a focused beam of electrons across an object.

扫描电子显微镜是通过扫描聚焦在物体上的电子束来工作的。

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To do that requires scanning the object beam through the target about a hundred different ways.

ECONOMIST: Microscopy

It works by scanning a laser beam across an object and manipulating the reflected light to produce an extremely narrow focal plane.

ECONOMIST: The Archimedes palimpsest: Eureka! | The