origin tracing是什么意思？

• neck
• lesson
• 导师英文
• 来源英语
• emergency
• juice
• disappointed
• committing
• searches
• 局外人英文
• erased
• PEGGING
• tourist
• pear
• autumn
• mind
• conflict
• organizations
• panicked
• 方案英语
• predict
• narrow
• failure
• 流浪者英文
• giraffe
• supper
• bothering
• front
• lycopene
• 缺陷英文

• 参数英文
• volume
• modernize
• default
• scared
• polite
• 权限英文
• brat
• passage
• tomato
• monitor
• 解决方案英文
• fiercely
• ultra
• 旋律的英文
• 分配英文
• cheese
• sweater
• bombarded
• maths
• various
• explore
• lake
• theatre
• banger
• 确认英文
• dragon
• vehicle
• crayon
• droplets

• spontoon
• the composite family
• micro method
• guelder
• Advertising Battle
• em rule
• mohsite
• pontifex
• Automatic request
• post house
• Goren
• handbrakes
• go to a doctor
• mark with the centre
• foment trouble
• rough and ready chap
• On shore
• parhelion
• Muscle wave
• key panel