Part per million是什么意思？

• explore
• approaches
• sweater
• satisfaction
• PEGGING
• ticket
• narrow
• text
• aspect
• erased
• giraffe
• candy
• 缺陷英文
• rice
• theatre
• giraffe
• pear
• tomato
• reveal
• organizations
• conflict
• 来源英语
• 分配英文
• lycopene
• 呼吁英语
• maths
• 领域英语
• amazing
• 纪念品英语
• begins

• repeat
• polite
• 实施英文
• permitted
• 造型的英文
• front
• mind
• juice
• disappointed
• failure
• banger
• autumn
• prompt
• panicked
• 解决方案英文
• bothering
• 方案英语
• scared
• predict
• general
• profile
• general
• volume
• passage
• lesson
• emergency
• vehicle
• 队长的英文
• cheese
• 确认英文

• desquamation
• dessert
• dessertspoon
• dessicant
• dessin
• destabilization
• destabilize
• destabilized
• destacking
• destage
• destarched
• destaticizer
• destaticizing
• destearinate
• desterilization
• desterilize
• desticker
• destination
• destine
• destined
• destinker
• destiny
• destitute
• destitution
• Destn
• destressing
• destrier
• destroy
• destroyed
• destroyer