中的"备份"用英语怎么说我知道有个名词的备份叫"b

备份

[词典]

backups;

[计]

back-up;

[例句]当我因为忘了备份把完成的工作弄丢时，真是懊恼极了。

I

get

so

annoyed

when

I

lose

work

because

I've

forgotten

to

back

it

up.