n.尿素
A kidney also takes urea and mineral salts out of the blood. 肾还排出血液中的尿素和无机盐。
Sweat consists of water with small amounts of urea and salts. 汗液是由水和少量尿素和盐构成的。
n.局;办事处;(带抽屉的)写字台
bureaucracyn.官僚制度;官僚主义;官僚
bureaucratn.官僚作风的人;官僚
bureaucraticadj.官僚的;繁文缛节的
bureaucrats官僚
laureaten.桂冠诗人;得奖人