a stumbling block是什么意思？

• giraffe
• searches
• default
• 解决方案英文
• cloud
• fiercely
• disappointed
• text
• 权限英文
• approaches
• 分配英文
• juice
• PEGGING
• permitted
• scared
• 参与者英文
• 局外人英文
• droplets
• conflict
• client
• modernize
• 纪念品英语
• ultra
• general
• 方案英语
• amazing
• peeping
• 呼吁英语
• 旋律的英文
• organizations

• 导师英文
• bothering
• committing
• 确认英文
• various
• sweater
• panicked
• aspect
• supper
• vehicle
• tomato
• 造型的英文
• 参数英文
• saturday
• narrow
• 来源英语
• monitor
• reveal
• 队长的英文
• front
• begins
• autumn
• silver
• volume
• lycopene
• brat
• maths
• cheese
• tourist
• toxicity

• disaccharide
• disacchariduria
• disaccharose
• disaccommodation
• disaccomodation
• disaccord
• disacidify
• disacryl
• disadjust
• disadvantage
• disadvantaged
• disadvantageous
• disadvantageously
• disadvantages
• disaffect
• disaffected
• disaffection
• disaffirm
• disaffirmance
• disaffirmation
• disafforest
• disafforestation
• disaggregate
• disaggregation
• disagio
• disagree
• disagreeable
• disagreeably
• disagreement
• disallergization