四: four单元: unit; unit element; cell; lo ...码: a sign or object indicating ...四单元: unit four单元码: code unitary; unitary code第四单元: unit four agreement; unit four answers; unit four letters of thanks; unit four meeting minutes; unit four memorandum; unit four notice四单元制: four digit system四单元组: tetrad单元码元: unit element二单元码: two-part code六单元码: six unit code七单元码: seven-unit code五单元码: five level code四单元住宅楼。: four-plex第四单元 会议记录: unit four meeting minutes元码: code n-ary十八号楼四单元二号: no.2 entrance 4 building 18三元码: ternary code; three-unit code四元码: four-unit code位元码: bytecode像元码: cell code四单价的: tetrabasic四单位制: four figure system对称二元码: symmetrical binary code二位元码: binary code