directline直通行directadj.直接的；笔直的；坦白的v.对准；指挥；指示；命令direct negative staining method直接负染法direct density dependent factor直接密度制约因素direct and overdrive clutch hub直接及超速传动离合器毂Direct Access Management System直接存取管理系统direct radionuclide cystography直接放射核素膀胱成像(术)direct product of linear spaces线性空间的直积direct sequence sprbad spectrum直接序列扩频direct-vision objective prism直视物端棱镜direct transfer skin graft flap直接移转的皮瓣direct band-gap semiconductor直接跃迁半导体

1. Direct Current Plasma Emission Spectrometer DCP M.
   直流等离子体发射光谱仪。
2. The system can measure the direct current frequency acceleration.
   该系统可以测量频率低至直流的加速度。