n.

an accumulation caused by clogging or a stoppage

"a traffic backup on the main street"; "he discovered a backup in the toilet"

someone who takes the place of another (as when things get dangerous or difficult)

同義詞：stand-insubstitutereliefrelieverbackup manfill-in

a subordinate musical part; provides background for more important parts

同義詞：accompanimentmusical accompanimentsupport

(computer science) a copy of a file or directory on a separate storage device

"he made a backup in case the original was accidentally damaged or erased"

同義詞：computer backup

the act of providing approval and support

同義詞：backingchampionshippatronage

Method and apparatus for performing retroactive backups in a computer system
Redundant cell death mechanisms as relics and backups
Techniques for managing virtual machine backups
Dual-chamber pacing or ventricular backup pacing in patients with an implantable defibrillator: the Dual Chamber and VVI Implantable...
AODV-BR: backup routing in ad hoc networks
AODV-BR : Backup routing in ad hoc networks
Efficient Selectivity and Backup Operators in Monte-Carlo Tree Search
Efficient Selectivity and Backup Operators in Monte-Carlo Tree Search
Backup Agreements in Fashion Buying-The Value of Upstream Flexibility
Pastiche: making backup cheap and easy