reduce to a lower rank是什么意思？

• giraffe
• 领域英语
• cheese
• brat
• juice
• autumn
• begins
• default
• 旋律的英文
• lesson
• repeat
• bothering
• 来源英语
• saturday
• profile
• lycopene
• 缺陷英文
• pear
• searches
• giraffe
• 呼吁英语
• crayon
• volume
• rice
• cloud
• 参与者英文
• 局外人英文
• tourist
• erased
• BARRIE

• amazing
• passage
• scared
• general
• polite
• dragon
• mind
• narrow
• silver
• disappointed
• candy
• toxicity
• fiercely
• 队长的英文
• approaches
• ticket
• bombarded
• searches
• droplets
• 抛弃英文
• sweater
• explore
• permitted
• failure
• peeping
• various
• theatre
• ultra
• 方案英语
• monitor

• bulwark
• bum
• bumadizone
• bumbailiff
• bumble
• bumblebee
• bumbledom
• bumblefoot
• bumblepuppy
• bumbler
• bumbling
• bumbo
• bumboat
• bumetanide
• bumetrizole
• bumf
• bummer
• bump
• bumper
• bumph
• bumpier
• bumpiest
• bumpily
• bumpiness
• bumping
• bumpkin
• bumptious
• bumpy
• bun
• buna