怎么翻译 backup a file before overwrite it

怎么翻译 backup a file before overwrite it This file already exists,do you want to overwrite it? This file already exsts,do you want to overwrite it file alredy exist.overwrite的意思 请问怎么翻译?It is always calm before a storm File怎么翻译 File 'D:\单片机\STARTUP.A51' already exists,overwrite? A little backup would have killed you 翻译 Before we knew it 怎么翻译? technical construction file怎么翻译? Have you heard it before?这句英文怎么翻译? 怎么翻译checking file system on C: