transformation-drill
转换练习
...the Grammar Translation Method 语法翻译法 transformation drill 转换练习 single-slot substitution 单一成分替换 ...
2.
转换操练
英语教学法术......total physical response method 整体动作反应法transformation drill 转换操练 translation method 翻译法 ...
Technics Study of Laser Transformation Hardening on the Drill-Stem JointMaterial
钻杆接头材料激光相变硬化的工艺研究
2.
Transformation of the Antijamming System of an Imported Hydraulic big HoleDrill Carrier
进口全液压大孔凿岩台车防卡系统的改造