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26 in the process of 在┄的过程中; 27 in time后来渐渐,终于 ; 28 in turn 依次地,反过来; 29 in vain徒劳 30 in whole 整个地 31 infuseinto注入 32 insist on坚持，一定要 33 instead of 代替 34 interest in对的兴趣 35 irrespective of不顾的,不考虑的; 36 isolate from 使~与~隔离;使孤立 ; 37 it used to be 过去的情况是 38 join in 参加; 39 lay emphasis on 强调; 40 lay/put blame on责怪，归咎于 41 lead off 开始; 42 lead on 继续引领; 43 lead out 开始; 44 lead to 导致; 45 less than 不如，少于 46 link together联系在一起 47 long before早在┄之前，很久以前 48 look on旁观，观看 49 loyal to忠诚于 50 make a step 走一步 | 
