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keep secret保守秘密 keep an eye on留意，照看 keep away from避开，远离 keep back阻止，阻挡;隐瞒，保留 keep company with与交往，与结伴 keep down控制，压制，镇压;压低，放低 keep from使不 keep house管理家务，做家务 keep in mind记住 keep in touch保持联系 keep off不接近，避开 keep on继续不断，保持 keep ones eyes open留神看 keep ones head保持镇静 keep ones word守信用 keep out of躲开，置身之外 keep to坚持，保持 keep track of通晓事态，注意动向 keep up保持，维持;继续进行;坚持 keep/be abreast of/with跟上，与保持并列，不落后于 knock down撞倒，击倒 knock out击倒，击昏 know about听说，了解 know of/about听说，知道，了解 | 
