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401 instead of 代替，而不是 402. instructin 教.指导.训练某人 403. insurefor 把保险; ensure 使安全; assure 使确信,保证 404. insureagainst 保险以防 405. intendfor 打算把给 406. intent on 专心致志, 坚决 407. in the interests of 符合的利益 be interested in 对感兴趣 408. interfere in干涉, interfere with打搅,干扰 409. at intervals 每隔一会儿, 每隔一段距离 410. intervene in 干预 411. invest in 投资 412. be involved in 卷入, 参加 413. by itself 单独地,靠自己 414. in itself 本身; of itself 自发,自然 415. be jealous of 妒忌 416. jump at 抢着接受, 417. jump on 叱责 418. junior to sb. 年纪较轻, 职位较低. 419. keen on 喜爱, 渴望 420. keep a close watch on 密切注视 421. keepto oneself不告诉别人 422. to ones knowledge 据所知 423. at large 在逃, 逍遥法外 at large 一般来说, 大体上 at large详细地 424. lean against 靠着 425. at least 至少; at most 至多 | 
