fall back on是什么意思？

• volume
• giraffe
• brat
• 抛弃英文
• mind
• juice
• banger
• saturday
• autumn
• begins
• pear
• 确认英文
• rice
• 分配英文
• 实施英文
• explore
• vehicle
• reveal
• crayon
• disappointed
• 来源英语
• lycopene
• satisfaction
• algiers
• bothering
• text
• 解决方案英文
• cloud
• narrow
• failure

• approaches
• monitor
• front
• BARRIE
• sweater
• general
• predict
• default
• 局外人英文
• ticket
• client
• droplets
• theatre
• 造型的英文
• searches
• 队长的英文
• 呼吁英语
• lake
• general
• aspect
• 缺陷英文
• maths
• scared
• 纪念品英语
• permitted
• amazing
• cheese
• fiercely
• panicked
• candy

• fee of permit
• have blurred vision
• headiest
• plasterer
• sperm oil
• De karakters
• uncoiler
• Egginton
• overstock
• lead bath
• Set of documents
• dietetical
• sleeted
• nematoid
• sloshes
• apartness
• collected edition
• wryly
• incorporeality
• kind and gentle
• dioxo
• globe joint
• fonofos