n. 操练;钻头;军事训练;(应对紧急情况的)演习;
vt.& vi. 钻(孔);打(眼);操练;训练;
vt. 作…演习,操练;
💡 锥哦(谐音): 练习 钻孔
"After a long drill, the commander told his men to fall out."
在操练了很长时间以后, 指挥官命令士兵们解散.
近义:instruction, learning, schooling, teaching, training, tuition
n. 切断, 切下, 路堑\\n[化] 切屑
近义:snippet, clipping, snip, trimming, clip, trim
反义:innocuous, offenceless, safe, unoffending, benign, harmless