reference gas参考气体； 标准气referencen.参考；参照；出处；推荐人；推荐函v.注明出处；附参考资料reference and continuity借鉴和延续reference scaling factor参考比例因子reference sound pressure参考声压reference semi-lattice参考半格reference representation标准表达式reference recording head基准录音磁头reference-phase signal基准相位信号reference input elements参考输入元件reference debugging aids凋试辅助程序, 调试辅助程序引用reference voltage source基准电压源

1. A light beam rushed to the night sky.
   一道光束冲向夜空。
2. A beam of light produced by a laser can weldmetals.
   激光器发生的光束可以焊接金属。