sharpen
sharpensharpen[ˈʃɑːp(ə)n],sharpen 'up; ,sharpen sb/sth 'up 1.■to become,or to make sb/sth, better, more skilful, more effective, etc. than before﹙使﹚变得更好﹙或技术更高、更有效等﹚；提高某人﹙或事物﹚的水平﹙或技术、效率等﹚:She needs to sharpen up before next month’s competition.下个月比赛之前，她的水平需要提高一下。This exercise will help students sharpen up their reading skills.这个练习将帮助学生提高阅读能力。Discipline has sharpened them up.纪律使他们更有效率了。[G]v+adv ◆ v+adv+n ◆ v+n/pron+adv
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