281 in the course of 在……过程中,在……期间
282 in the end最后
283 in the event of 万一发生;
284 in the form of以┄形状,以┄形式;
285 in the light of鉴于,由于;
286 in the process of 在┄的过程中;
287 in time后来渐渐,终于 ;
288 in turn 依次地,反过来;
289 in vain徒劳
290 in whole 整个地
291 infuse … into注入
292 insist on坚持,一定要
293 instead of 代替
294 interest in对……的兴趣
295 irrespective of不顾的,不考虑的;
296 isolate …from 使~与~隔离;使孤立 ;
297 it used to be 过去的情况是……
298 join in 参加(某种活动);
299 lay emphasis on 强调;
300 lay/put blame on责怪,归咎于
301 lead off 开始;
302 lead on 继续引领;
303 lead out 开始;
304 lead to 导致;
305 less than 不如,少于
306 link together联系在一起