counter drill

英 美
  • 埋头钻
  • counter n.柜台;筹码;计数器;反驳adj.相反的adv.与…相反地v.反对;反击
  • drill n.钻孔机;钻子;反复操练;播种机v.练习;钻孔;(军事)训练
动词 counter-drill:
  1. drill in an opposite direction