down adv.向下prep.沿着...而下adj.向下的；消沉的；无礼的n.绒毛；汗毛v.击倒；打败；吞下；被抑制
双语例句
It is proposed that the efficient polyphase structure of bandwidth-matched digital downconversion and a significant improvement in efficiency and realizability can be achieved. 文中还进一步给出带宽匹配接收数字下变频的多相高效结构，运算效率和工程可实现性大大提高。
