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| 1. | provides strong beam for use in foggy weather. |
| 用于有雾的天气的能产生强光的灯。 |
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| 2. | Indeed the use of an electron beam or X-rays for irradiation overcomes the need for a radioactive source |
| 用电子束或X-射线进行辐照确实完全解除了对某种放射源的需要。 |
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| 3. | economical and practical collimation method-single lens collimation method to collimate semiconductor laser beam |
| 其中用单透镜准直法对有大发散角的半导体激光光束成功地实现了准直，既简单又经济实用；用平移物镜法实现了激光点的扫描。 |
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