back-up是什么意思？

• intermission
• firmness
• emergency
• monitor
• saturday
• 抛弃英文
• amazing
• 来源英语
• brat
• 方案英语
• permitted
• tourist
• profile
• general
• toxicity
• general
• modernize
• client
• volume
• 旋律的英文
• silver
• text
• passage
• banger
• giraffe
• neck
• giraffe
• peeping
• failure
• autumn

• aspect
• approaches
• 纪念品英语
• fiercely
• begins
• 造型的英文
• lycopene
• rice
• crayon
• panicked
• 缺陷英文
• disappointed
• pear
• chess翻译
• searches
• passage
• 分配英文
• 呼吁英语
• cloud
• ultra
• algiers
• mind
• maths
• tomato
• sweater
• front
• explore
• bombarded
• 领域英语
• prompt

• chirm
• Cutting people
• Confucianists
• brain tumor
• benzide
• working face
• boat seaplane
• bustling and crowded
• blow away
• punctilios
• Peel out pods
• figure plate
• Direktor
• break a treaty
• a Jack of all trades
• transuded
• litter bins
• master form
• personified
• come to naught
• dipping agent
• Young Duck
• pustules
• karyogram
• fellow official
• Chart direction
• floor boarding
• ectopic pregnancy