fall in [英] [fɔ:l ɪn] [美] [fɔl ɪn] [短语] 集合;坍塌 词频排名 3292/55435 学习人数 10 难度等级 10/10 认知比例 100.00% 例句 The prisoners are ordered to fall in. 犯人们被命令集合。 The house seems likely to fall in. 这栋房子看起来像是要倒塌。 助记 联想 collapse fold up fall in love爱上 fall out 发生;脱落;争吵;离队;结果是