O ' Brien先生说，城市高楼大厦之间并非激光束往来交错，因为这一技术使用的都是红外光。
City skylines are not criss-crossed with grids of laser beams because it is all done using invisible infra-red light, says Mr O 'brien.
激光束聚焦性能研究是激光推进技术研究中的一个重要内容。
The study of the focusing characteristics of laser beam is an important content in the study of laser propulsion technology.
在光盘技术中，激光束改变塑料或金属盘的表面来代表数据。
In optical-disk technology, a laser beam alters the surface of a plastic or metallic disk to represent data.
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