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| 41. | was safer than Savery's engine because it didn't use high pressure steam--the piston is brought up by |
| 这种蒸汽发动机比萨韦里的安全，因为它不采用高压蒸汽——活塞是由吊杆而不是由蒸汽带动的，并且，只要加大圆筒，发动机的功率就能大大增加。 |
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| -- 来源 -- 英汉非文学 - 科学史 - kexueshi-zhenqifadongji |
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| 42. | The Hong Kong Time Standard is provided by a caesium beam atomicclock. |
| 天文台利用铯原子钟，提供香港的时间标准，该钟误差每日不超过一微秒。 |
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| 43. | The output power of laser can be exactly measured by the method of beam splitting monitoring. |
| 通过分束监视 ,实现了激光输出功率的准确计量 ; |
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| 44. | The theory and corresponding experiment of the intensity profile modification of a Gaussian laser beam |
| 本文报道和讨论了在超声驻波作用下实现激光高斯光束空间强度整形的原理与实验。 |
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| 45. | It's similar to an ordinary record, except that it's read by a laser beam, and the information recorded |
| 它以数字形式把信息记录在铝片上，并且由激光束阅读，除此之外，它和普通的唱片很相似。 |
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| 46. | Rather than using pure volume to throw sound far, the LRAD reaches distant ears by focusing the audio |
| 甚至用一种纯洁的声音传播的远远的，LRAD通过聚集的声音柱将声音传到远方的耳朵里。 |
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| 47. | This pattern is displayed on a small flat-panel display, which is illuminated by a laser beam so that |
| 激光束照亮一个小的平板显示屏，使图样在屏幕上显示出来，这样它就可以对图样进行编码。 |
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| 48. | By reducing the beam spot size, it provides 30% more screen real estate with no added footprint, says |
| 据Sony公司称，把电子束的直径缩小，不用增加（显示器）占桌面面积，就可以把屏幕实际使用面积增加30%，换言之，在屏幕上可以显示更多的窗口。 |
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| 49. | The rust preventive ability of five kinds of oil is estimated by a wire beam electrode, and is contrasted |
| 采用自制的丝束电极对5种油品的防锈性能进行了评价，并与传统的盐雾试验进行了对照。 |
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| 50. | essential of HOEs, which is the interference between plane wave and sphere wave, can focus the light beam |
| 摘要干涉式波带板系由平面波和球面波两道光波干涉而成，为研究全像光学元件的基础，其可经由绕射作用达到聚焦效果，犹如使用传统凸透镜或凹面镜所产生的效果。 |
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