| 单词 | 电子束 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔focus〕Magnetic coils focus the electron beams into fine spots.磁线圈把电子束聚焦成微小的点。柯林斯高阶〔ion trap〕A device, such as a magnet, used to prevent ions in an electron beam from striking other apparatus.离子阀：用来防止电子束中的离子击中其它设备的一种装置，如一块磁铁美国传统〔magnification〕The electron microscope uses a beam of electrons to produce images at high magnifications.电子显微镜利用电子束形成高倍影像。外研社新世纪〔magnification〕The electron microscope uses a beam of electrons to produce images at high magnifications.电子显微镜利用电子束形成高倍影像。柯林斯高阶〔modulate〕To vary (electron velocity) in an electron beam.调制：在一个电子束中改变（电子速率）美国传统〔scan〕A single sweep of the beam of electrons across a television screen.扫掠：电子束在电视屏幕上的扫动美国传统〔scan〕To move a finely focused beam of light or electrons in a systematic pattern over (a surface) in order to reproduce or sense and subsequently transmit an image.扫描：以系统的方式移动高度集中的光或电子束使之掠过（一个表面），目的是再现或感知并达到传递图象美国传统〔x-ray tube〕A vacuum tube containing electrodes that accelerate electrons and direct them to a metal anode, where their impacts produce x-rays.X射线管：一种含电极的真空管，它能使电子束加速并将其指向金属阳极而产生X射线美国传统 |
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