dross
n[U]
(a) scum of waste matter on melted metals 浮渣(浮在熔化的金属上的废物).
(b) (fig 比喻) least valuable, attractive, etc part of sth 无价值、 无吸引力之处
The best players go off to the big clubs, leaving us the dross. 最好的队员都投奔大俱乐部去了, 就只给我们剩下些不中用的人.
Mead predicts that inventors will be able to perfect powerful customized chips over a weekend at the office -- spawning a new generation of garage start-ups and giving the U.S.a jump on its foreign rivals in getting new products to market fast.