fall in片語動詞KK [fɔl ɪn] /fɔl ɪn/發音片語動詞1掉進去、落水He leaned too far over the pond and fell in.他身子往池邊探得太出去,結果掉了進去。2塌陷、倒塌、坍下來The roof of the old barn fell in after weeks of rain.連下了幾週的雨,那座舊穀倉的屋頂塌了下來。3集合、列隊軍事The soldiers fell in quickly when the order was given.命令一下,士兵們迅速集合列隊。4跟上、走在後面She fell in beside me and we walked to the station together.她跟到我身邊,我們一起走去車站。