optical aid

 
       
  • 视觉辅助器,光学辅助工具

optical aid的用法和样例:

例句

  1. Given the surviving records for all manner of other optical systems and mechanical drawing aids, the absence of evidence for the Hockney projector is difficult to explain.
    其他光学系统与绘图辅助工具的记录,到今天都还留存了不少,为何唯独缺乏霍克尼投影设备的证据,显然很难解释。
今日热词
目录 附录 查词历史