directnessn.直接;直率
directadj.直接的;笔直的;坦白的v.对准;指挥;指示;命令
direct observation form直接观察式
direct ammonia recovery氨气直接回收法
direct transmitted echo直达波
direct aeration methods直接离心浮集法
direct positive process直接阳画法
direct demand operating半自动立接工作方式
direct health care role直接保健作用
Direct current sounding直流电测深
direct transmitted beam直接透射的光束
directed system of sets正向集系