downward slope是什么意思？

• searches
• maths
• begins
• toxicity
• bombarded
• 队长的英文
• giraffe
• 抛弃英文
• BARRIE
• narrow
• prompt
• ticket
• droplets
• passage
• polite
• profile
• brat
• autumn
• sweater
• scared
• tourist
• intermission
• predict
• 呼吁英语
• 局外人英文
• various
• committing
• 实施英文
• pear
• monitor

• 造型的英文
• panicked
• 来源英语
• failure
• firmness
• banger
• text
• permitted
• PEGGING
• lesson
• bothering
• 分配英文
• approaches
• amazing
• peeping
• lake
• erased
• conflict
• aspect
• passage
• 缺陷英文
• default
• tomato
• 参数英文
• client
• saturday
• juice
• disappointed
• vehicle
• volume

• flavomycoin
• flavone
• flavonoid
• flavonol
• flavoprotein
• flavor
• flavorhodin
• flavoring
• flavorless
• flavorous
• flavour
• flavoured
• flavouring
• flavourless
• flavourous
• flavoxanthin
• flavoxate
• flavoxathin
• flaw
• flawless
• flax
• flaxen
• flaxseed
• flay
• flea
• fleabag
• fleabane
• fleabite
• fleahopper
• fleam