source

n.根泉，来源，出处

sound barrier (also sonic barrier), sound effect, sound-proof, sound-recording, sound-track, sound-wave, sounding, sounding-board, soundings, soundless, soundlessly, soundly, soundness, sounds, soup, soup-kitchen, soup-plate, soupcon, sour, sour cream, sourdough, sourly, sourness, sourpuss, souse, soused, south, south (also South), South Africa, South African, South American, south-east (also ,South-East), south-easter, south-easterly, south-eastern, south-west (also ,South-West), south-wester, south-westerly, south-western, Southampton,