I made a bit of a boob throwing that file away.我犯了个愚蠢的错误，把那份文件扔掉了。You have to file away for hours to get this metal smooth.你得锉上几个小时才能使这金属变得光滑.Please file away this report.请把这份报告归档....

file away的音标：file away的英式发音音标为：[fail ə'wei]file away的美式发音音标为：[faɪl ə'we]...

存档（备查），锉掉，锉削...