This photomicrograph was obtained by scanning a beam of electrons across the sample while a detector kept track of electrons bouncing off its surface, betraying the specimen's outer shape.

这幅显微照片是通过扫描穿过样品的电子束而获得的，同时检测器对从样品表面反弹的电子进行追踪，这些电子显示了标本的外形。

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GPFS also enables a large system to keep track of its many files without laboriously scanning through every one.

GPFS同也能使大型系统无需彻底地扫描每一个文件就能追踪许多文件。

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Meanwhile, the effects of processing parameters of EB brazing on the temperature field at optimal scanning track are discussed.

同时，讨论了最佳扫描轨迹下电子束钎焊工艺参数对温度场的影响。

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Our app can then track usage when scanning a QR code even if the code was created on a site outside of Scan.

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In one study in 2004 researchers at the University of Toronto used positron emission tomography scanning to track the brain activity of 14 depressed patients who had successfully been treated with CBT, comparing them with 13 patients who got better by taking only Paxil.

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