"he threw to a downfield receiver"
"he caught the ball and ran downfield 15 yards"
Downtonn.唐顿
downadv.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
Downrange Computer Input System弹道下段射程计算机输入系统
Down-flow constructed wetland下行流人工湿地
Down bamboo-truncating portal逆斜切式隧道门
downlink transmission technique下行传输技术
Down flowed the brown cascade.那棕色瀑布一下子就流淌下来。
Down load equivalent outage hour减低出力等效停运小时数
Down-hole millisecond blasting孔内毫秒爆破
down-to-floor lattice window落地花格窗