gratings的翻译，读音
英/ɡ'reɪtɪŋz/
释义：
n. 格栅, 栅栏, 格子( grating的复数形式 )
n. a barrier that has parallel or crossed bars blocking a passage but admitting air
n. a frame of iron bars to hold a fire
n. optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum
n. a barrier that has parallel or crossed bars blocking a passage but admitting air
n. a frame of iron bars to hold a fire
n. optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum