a tool or machine that makes holes钻;钻床;钻机
an activity that practises a particular skill and often involves repeating the same thing several times, especially a military exercise intended to train soldiers(尤指军事)训练,练习
[ I or T ] to make a hole in something using a special tool(用特殊工具)钻孔;打眼
[ I or T ] to practise something, especially military exercises, or to make someone do this(尤指进行军事)训练,练习
[ T usually + adv/prep ] to tell someone something repeatedly to make them remember it(为记忆而)反复训练,重复灌输
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