It have no the star's beauty,but can forerun the rays of light.

虽没有繁星的美丽，却能预示！

Forerun always one step of its competitors on fabrication of coatings especially on laser system and infrared system.

片；纤薄膜……尤其在激及倍频晶、红外晶，紫外波段镀膜方面，具备优。

Improvements on the process of light benzol forerunning are described in this paper, Practice shows that these improvements are successful.

轻苯初馏工艺的生产改进。实践证明，这些改进是成功的。