direct cut直接劈directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct platelet count[医] 血小板直接计数direct aldol reaction直接Aldol反应direct a telescope at把望远镜对着direct current cables直流电缆direct thrust control直接推力控制direct current output直流输出direct melt oxidation直接金属氧化directed simple graph有向简单图direct switching-in直接合闸direct sowing of rice稻直播