406.(be)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
406.(be)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