英语语法分析

This paper describes a phototypesetter with four scanning laser beams. There are four He-Ne Lasers and four acoustooptic modulators in the phototypesetter.

本文介绍了四束激光扫描照排机，照排机内安装有四支氦氖激光器及四个声光调制器。

Second-generation phototypesetter A computer aided phototypesetting system using flash tube as the light source and a rotating film matrix for exposing the film or paper.

第二代照排机电脑辅助的照相排字系统。它用闪光管作光源，把旋转中的菲林字母板上的字体影排队于菲林或相纸上。