gratings [ɡ'reɪtɪŋz]

例句:

• The light is resolved by prisms, gratings, or by an interferometer.
  光线用棱镜 、 光栅或干涉仪分解.
  
• Many of the roofs were so full of holes that they looked like gratings.
  许多屋顶千穿百孔,象筛子一样.
  
• All gratings shall lie flat with no tendency to rock when installed.
  安装时所有的栅栏都是平躺的,摇动时不发生倾斜.
  
• It was nicknamed Pandora's box and it was like a sauna with only two tiny gratings supplying the only fresh air.
  来自BBC