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Ⅰ. drill “练习” 指有组织，有指导地反复进行的练习。尤指在课堂上或军队里进行的教练。如： Question-and –answer drills are important when yu are learning a foreign language. Ⅱ. exercise 指为发展智力或锻炼身体而进行的练习。如： ① He is doing an exercise in English grammar. ② We do morning exercises every day. Ⅲ. practice 是不可数名词，指为了达到熟练或完善的程度 而反复进行的练习。尤指在艺术、手艺或技巧方面。如： Piano playing needs a lot of practice.弹钢琴需要多练。 | 
