单词	shadow
释义	shadow An area of darkness formed on a surface when an object intercepts the light falling on the surface from a source. In the case of a point source the shadow has a sharply defined outline. If the source has an appreciable size the shadow has two distinct regions; one of full-shadow, called the umbra , the other of half-shadow, called the penumbra (see illustration). Shadows
随便看	lambda point lambert Lambert's laws laminar flow laminated core Landau damping Landau ghost Landé interval rule Langevin equation Langmuir frequency Laplace equation Larmor precession laser laser printer latent heat lateral inversion lateral velocity latitude and longitude lattice lattice energy lattice gauge theory lattice vibrations latus rectum Laue, Max Theodor Felix von launch vehicle

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