Grating
01
a covering with parallel or crossed bars, used to block a passage while allowing air or light to pass
例子
A metal grating covered the drain to prevent debris from entering.
02
a frame of iron bars designed to hold a fire in a fireplace or furnace
例子
The old fireplace had a cast-iron grating for cooking.
03
an optical device with many parallel grooves that disperses a beam of light or other electromagnetic radiation into its component wavelengths to produce a spectrum
例子
A diffraction grating split the laser beam into multiple colors.
