staple

n.主要产品；原料；因素

stand-offishness, stand-pipe, stand-up, standard, standard lamp (US `floor lamp), standard of living, standard time, standard-bearer, standardization, standardisation, standardize, standardize, standardise, standing, standing order, standing ovation, standing-room, standpoint, standstill, Stanford, stank, stanza, stapler, star, Star of Bethlehem, star sign, star turn, star-dust, star-gazer, star-gazing, star-studded, starboard, starch, starchy, stardom, stare, stare at, starfish, stark, starkers, starkly, starkness,