sapwood

n [U] soft outer layers of wood 边材, 白木质（木之柔软的外层）.

sanitarium, sanitorium, sanitary, sanitary towel, `sanitary pad, sanitation, sanitize, sanitise, sanity, sank, sanserif, Santa Claus, sap, sapience, sapient, sapiently, sapling, Sapphic, Sapphic (also sapphic), sapphire, sappy, saprophyte, saprophytic, Saracen, sarcasm, sarcastic, sarcastically, sarcophagus, sardine, sardonic, sardonically, Sargasso Sea, sari, sarky, sarong, sartorial, sartorially, SAS, sash, sash-cord, sash-window, sashay, sass,